Dizziness

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: M.Umer Tariq [2]

Overview

Many different terms are often used to describe what is collectively known as dizziness. Common descriptions include words such as lightheaded, floating, whoozy, giddy, confused, helpless or fuzzy. Vertigo, Disequilibrium and Pre-syncope are the terms in use by most doctors. Dizziness is sometimes a symptom of a balance disorder.

Classification

Vertigo

The word "vertigo" comes from the Latin "vertere", to turn + the suffix "-igo", a condition = a condition of turning about.

Vertigo is a specific medical term used to describe the sensation of spinning or having the room spin about you. Most people find vertigo very disturbing and often report associated nausea and vomiting.

Disequilibrium

Disequilibrium is the sensation of being off balance, and is most often characterized by frequent falls in a specific direction. This condition is not often associated with nausea or vomiting.

Pre-syncope

Pre-syncope is most often described as lightheaded or feeling faint. Syncope, by contrast, is actually fainting. Pre-syncope, or lightheadedness, does not result from primary central nervous system pathology. Nor does it originate in the inner ear. It is most often cardiovascular in etiology. In many patients, lightheadedness is a symptom of orthostatic hypotension. Orthostatic hypotension occurs when the blood pressure drops significantly when the patient stands from a supine or seated position. If loss of consciousness occurs in this situation, it is termed syncope.

Causes

Causes by Organ System

Cardiovascular	Aortic Stenosis, Aortic valve stenosis, Atrial flutter, Atrial myxoma, Cardiac amyloidosis, Cardiomegaly, Cerebrovascular disease, Familial atrial fibrillation, Hypertension, Inappropriate sinus tachycardia, Peripheral Arterial Disease, Pulmonary hypertension, Pulmonary valve stenosis, Second Degree AV Block, Sick sinus syndrome, Sinus bradycardia, Supraventricular tachycardia, Wolff-Parkinson-White Syndrome,
Chemical / poisoning	Alcohol flush reaction, Amnesic shellfish poisoning, Amyl nitrite, Antimony, Bromomethane, Bothrops, Cadmium poisoning, Carbon monoxide poisoning, Cyanogen, Ephedra, Ethylene, Furfural, Ginkgo, Green Tobacco Sickness, Heavy metal ingestion, Hydrazine, Lead, Marine toxins, Mushroom poisoning, Norplant, Nutmeg, Opioid, Scombroid food poisoning, Rubbing alcohol, Solanine, Trichloroethylene,
Dermatologic	No underlying causes
Drug Side Effect	1,1,1-Trichloroethane, 1,4-Dichlorobenzene, 3-Quinuclidinyl benzilate, 5-HT3 antagonist, Abatacept Injection (patient information), Abciximab (patient information), Acamprosate (patient information), Acebutolol (patient information), Aceclofenac, Acetaminophen and Codeine (patient information), Acetohexamide (patient information), Acetylsalicylic acid (patient information), Acitretin (patient information), Aciclovir, Actiq, Acyclovir (patient information), Adalimumab Injection (patient information), Ajulemic acid, Alatrofloxacin Injection (patient information), Albuterol (patient information), Aldesleukin (patient information), Alendronate (patient information), Alfuzosin (patient information), Aliskiren (patient information), Alprazolam (patient information), Altretamine (patient information), Amantadine (patient information), Amifostine Injection (patient information), Amiloride and Hydrochlorothiazide (patient information), Amiodarone, Amitriptyline (patient information), Amlodipine (patient information), Amobarbital (patient information), Amphotericin B Injection (patient information), Ampicillin Sodium Injection (patient information), Anagrelide (patient information), Anastrozole (patient information), Angiotensin Converting Enzyme Inhibitor (patient information), Antihemophilic Factor (Human) (patient information), Antihemophilic Factor (Recombinant) (patient information), Aprepitant (patient information), Aripiprazole (patient information), Asparaginase (patient information), Atazanavir (patient information), Atenolol (patient information), Atorvastatin (patient information), Atovaquone (patient information), Azelastine, Azithromycin, Baclofen Oral (patient information), Benazepril (patient information), Benzodiazepine, Benzonatate (patient information), Benztropine Mesylate Oral (patient information), Bepridil (patient information), Bethanechol (patient information), Bevacizumab Injection (patient information), Bezafibrate (patient information), Bicalutamide (patient information), Biperiden, Bisoprolol (patient information), Bortezomib (patient information), Bosentan (patient information), Bromocriptine, Brompheniramine (patient information), Budesonide Inhalation Powder (patient information), Bumetanide (patient information), Buspirone (patient information), Busulfan (patient information), Bupivacaine, Buprenorphine, Bupropion, Butalbital, Butanethiol, Butorphanol, Butabarbital (patient information), Cabergoline, Cafergot, Calanolide A, Candesartan (patient information), Capecitabine (patient information), Captopril (patient information), Carbamazepine (patient information), Carboplatin (patient information), Carisoprodol (patient information), Carteolol (patient information), Carvedilol (patient information), Cefaclor, Centrophenoxine, Cetuximab Injection (patient information), Chlorambucil (patient information), Chlordiazepoxide (patient information), Chloroform, Chlorothiazide (patient information), Chlorpheniramine (patient information), Chlorpropamide (patient information), Chloropyramine, Chlorthalidone (patient information), Chlorzoxazone (patient information), Choline Magnesium Trisalicylate (patient information), Ciclesonide Nasal Spray (patient information), Cilostazol (patient information), Cimetidine (patient information), Cinacalcet (patient information), Cinoxacin (patient information), Citalopram, Cladribine (patient information), Clarithromycin, Clemastine (patient information), Clofarabine Injection (patient information), Clofibrate (patient information), Clomipramine (patient information), Clonazepam (patient information), Clonidine, Clopidogrel (patient information), Clorazepate (patient information), Codeine Oral (patient information), Colistimethate Injection (patient information), Colofac, Co-trimoxazole Injection (patient information), Cyanocobalamin Injection (patient information), Cyclobenzaprine (patient information), Cyclosporine (patient information), Cyproheptadine (patient information), Dacarbazine (patient information), Dactinomycin (patient information), Dalteparin Sodium Injection (patient information), Dantrolene Oral (patient information), Daptomycin, Darbepoetin Alfa Injection (patient information), Desipramine, Desoxyn, Dexmethylphenidate, Dextromethorphan, Dezocine, Desloratadine (patient information), Dexamethasone Oral (patient information), Dextroamphetamine and Amphetamine (patient information), Diazepam (patient information), Diampromide, Dicofol, Diethylcathinone, Dihydroetorphine, Dimenoxadol, Dinoprostone, Dioxaphetyl Butyrate, Dicyclomine (patient information), Didanosine (patient information), Diethylpropion (patient information), Diflunisal (patient information), Digoxin Oral (patient information), Diltiazem (patient information), Diphtheria, Tetanus, and Pertussis (DTaP) Vaccine (patient information), Dipyridamole (patient information), Disopyramide (patient information), Dobutamine Hydrochloride Injection (patient information), Docetaxel (patient information), Dofetilide (patient information), Dolasetron (patient information), Donepezil (patient information), Dothiepin, Doxepin, Doxazosin (patient information), Duloxetine, Efavirenz (patient information), Emtricitabine (patient information), Enalapril (patient information), Enfuvirtide Injection (patient information), Enoxacin (patient information), Entacapone (patient information), Entecavir (patient information), Eplerenone (patient information), Epoetin Alfa Injection (patient information), Ergotamine and Caffeine (patient information), Ephedrine, Escitalopram, Estrogen, Ethcathinone, Ethchlorvynol, Ethoheptazine, Ethosuximide, Ethotoin, Estazolam (patient information), Eszopiclone (patient information), Etanercept Injection (patient information), Etodolac (patient information), Etoposide Oral and Injection (patient information), Exemestane (patient information), Exenatide Injection (patient information), Ezetimibe (patient information), Famotidine (patient information), Felodipine (patient information), Fenofibrate (patient information), Fenoprofen (patient information), Fentanyl Citrate Injection (patient information), Fexofenadine (patient information), Fioricet, Fluconazole, Flunitrazepam, Flurazepam, Fluvoxamine, Flavoxate (patient information), Floxuridine (patient information), Fludrocortisone Acetate (patient information), Fluticasone Oral Inhalation (patient information), Formoterol (patient information), Fosamprenavir (patient information), Fosinopril (patient information), Frovatriptan (patient information), Fulvestrant Injection (patient information), Furosemide (patient information), Gabapentin (patient information), Galantamine (patient information), Ganciclovir (patient information), Gatifloxacin (patient information), Gemcitabine Hydrochloride (patient information), Gemeprost, Gemfibrozil (patient information), Glatiramer Injection (patient information), Glimepiride (patient information), Glipizide (patient information), Glutaraldehyde, Glyburide (patient information), Glycopyrrolate (patient information), Granisetron (patient information), Grifulvin V, Griseofulvin (patient information), Guanabenz (patient information), Guanethidine (patient information), Guanfacine (patient information), Gyromitrin, H2 antagonist, Hydrochlorothiazide (patient information), Hydrocodone, Hydromorphone, Hydrocortisone Injection (patient information), Hydroxychloroquine (patient information), Hydroxyzine (patient information), Hyoscyamine (patient information), Ibandronate (patient information), Idarubicin (patient information), Ifosfamide (patient information), Imatinib (patient information), Imiglucerase Injection (patient information), Imipenem and Cilastatin Sodium Injection (patient information), Iloperidone, Imipramine, Immune Globulin Intravenous Injection (patient information), Indapamide (patient information), Indinavir (patient information), Indomethacin (patient information), Infliximab Injection (patient information), Influenza Vaccine, Inactivated (patient information), Influenza Vaccine, Live Intranasal (patient information), Indometacin, Insulin lispro injection (patient information), Interferon Alfa-2a and Alfa-2b Injection (patient information), Interferon Alfacon-1 Injection (patient information), Interferon beta-1a Intramuscular Injection (patient information), Ipratropium Oral Inhalation (patient information), Irbesartan (patient information), Isocarboxazid (patient information), Isoproterenol Oral Inhalation (patient information), Isosorbide (patient information), Isoxsuprine Oral (patient information), Isradipine (patient information), Itraconazole (patient information), Iodomethane, Isopropyl alcohol, Ivabradine, Kaopectate, Ketorolac, Labetalol Oral (patient information), Lacosamide, Lamivudine (patient information), Lamotrigine (patient information), Lanthanum (patient information), Leflunomide (patient information), Letrozole (patient information), Leuprolide (patient information), Levalbuterol Oral Inhalation (patient information), Levetiracetam (patient information), Levodopa and Carbidopa (patient information), Levofloxacin Oral (patient information), Levomethadyl (patient information), Levorphanol Oral (patient information), Lindane (patient information), Levobupivacaine, Lidocaine, Lithium, Lomotil, Lisinopril (patient information), Lomustine (patient information), Loratadine (patient information), Lorazepam (patient information), Losartan (patient information), Loxapine Oral (patient information), Lysuride, Magnesium gluconate (patient information), Magnesium oxide (patient information), Mechlorethamine (patient information), Medroxyprogesterone (patient information), Mefenamic Acid (patient information), Mefloquine (patient information), Megestrol (patient information), Melphalan (patient information), Memantine, Meperidine (patient information), Meropenem Injection (patient information), Mesoridazine Oral (patient information), Mercaptopurine, Metethoheptazine, Metaproterenol (patient information), Metaxalone (patient information), Metformin (patient information), Methimazole (patient information), Methocarbamol Oral (patient information), Methotrexate (patient information), Methyclothiazide (patient information), Methylprednisolone Oral (patient information), Metipranolol Ophthalmic (patient information), Metheptazine, Methoxsalen, Methylergonovine, Methylphenidate, Methyprylon, Metronidazole, Metoclopramide, Metolazone (patient information), Metoprolol (patient information), Mexiletine, Miglitol (patient information), Mifepristone, Minocycline Injection, Minoxidil Oral (patient information), Mitomycin (patient information), Modafinil (patient information), Moexipril (patient information), Moricizine (patient information), Morphine Oral (patient information), Motofen, Moxonidine, Mycophenolate (patient information), Nabilone (patient information), Nabumetone (patient information), Nadolol (patient information), Nalbuphine, Nalmefene, Nebivolol, N-Ethyl-3-piperidyl benzilate, Naratriptan (patient information), Natalizumab injection (patient information), Nateglinide oral (patient information), Nelfinavir (patient information), Nevirapine (patient information), Nicardipine (patient information), Nicotine gum (patient information), Nicotine lozenges (patient information), Nifedipine (patient information), Nilutamide (patient information), Nimodipine (patient information), Nisoldipine (patient information), Niaprazine, Nitrazepam, Nitrous oxide, N-Methyl-3-piperidyl benzilate, Nizatidine (patient information), Norethindrone (patient information), Ofloxacin oral (patient information), Olanzapine (patient information), Olmesartan (patient information), Omalizumab injection (patient information), Omeprazole (patient information), Ondansetron (patient information), Orphenadrine (patient information), Oseltamivir (patient information), Oxacillin Sodium Injection (patient information), Oxaliplatin injection (patient information), Oxazepam (patient information), Oxcarbazepine (patient information), Oxybutynin (patient information), Paclitaxel (patient information), Paroxetine, Pentamidine, Perhexiline, Paliperidone (patient information), Pamidronate injection (patient information), Pegaspargase (patient information), Peginterferon alfa-2a (patient information), Peginterferon alfa-2b (patient information), Pemetrexed injection (patient information), Pemoline (patient information), Penbutolol (patient information), Pentazocine and naloxone (patient information), Pentosan polysulfate (patient information), Pentostatin (patient information), Pentoxifylline (patient information), Pergolide (patient information), Perindopril (patient information), Perphenazine oral (patient information), Phenazopyridine (patient information), Phenampromide, Phenazepam, Phenelzine, Phenobarbital, Phentermine, Phenytoin, Pholcodine, Piribedil, Piroxicam, Pizotifen, Phenoxybenzamine (patient information), Phenylephrine (patient information), Pilocarpine ophthalmic (patient information), Pimozide (patient information), Pindolol (patient information), Pioglitazone (patient information), Pirbuterol acetate oral inhalation (patient information), Plicamycin (patient information), Posaconazole (patient information), Pramipexole (patient information), Pramlintide injection (patient information), Prazepam (patient information), Prazosin (patient information), Pregabalin (patient information), Praziquantel, Pregabalin, Primaquine (patient information), Probenecid (patient information), Procainamide (patient information), Procarbazine (patient information), Proheptazine, Promethazine, Propafenone, Propiram, Pseudoephedrine, Propantheline (patient information), Propoxyphene (patient information), Propranolol Oral (patient information), Propylthiouracil (patient information), Protriptyline (patient information), Quinidine Oral (patient information), Quazepam, Quetiapine, Quinapril, Quinethazone, Quinoline, Ramipril, Rabeprazole (patient information), Ramelteon (patient information), Ranibizumab injection (patient information), Ranitidine hydrochloride injection (patient information), Ranolazine (patient information), Rasagiline (patient information), Repaglinide (patient information), Reboxetine, Remacemide, Remifentanil, Reserpine, Ribavirin (patient information), Riluzole (patient information), Risedronate (patient information), Risperidone (patient information), Ritonavir (patient information), Rituximab injection (patient information), Rivastigmine (patient information), Rizatriptan (patient information), Roflumilast, Ropivacaine, Roxithromycin, Ropinirole (patient information), Rosiglitazone (patient information), Rosuvastatin (patient information), Salmeterol oral inhalation (patient information), Salsalate (patient information), Saquinavir (patient information), Sargramostim injection (patient information), Scopolamine patch (patient information), Selegiline (patient information), Sibutramine (patient information), Sitaxsentan, Sildenafil (patient information), Sodium oxybate (patient information), Sodium stibogluconate, Solifenacin (patient information), Sotalol (patient information), Sparfloxacin (patient information), Spironolactone (patient information), Stimulant laxatives (patient information), Sulfadiazine (patient information), Sulfisoxazole (patient information), Sulindac (patient information), Sulprostone, Sumatriptan, Tamoxifen (patient information), Tamsulosin (patient information), Tegaserod (patient information), Telbivudine (patient information), Telithromycin (patient information), Telmisartan (patient information), Temozolomide (patient information), Teniposide (patient information), Terbutaline (patient information), Teriparatide (rDNA origin) Injection (patient information), Testosterone Transdermal (patient information), Thioridazine (patient information), Thiotepa (patient information), Thiothixene Oral (patient information), Ticarcillin Disodium Injection (patient information), Tiludronate (patient information), Timolol Oral (patient information), Tizanidine (patient information), Tapentadol, Temazepam, Tetrabenazine, Tetrahydrocannabinol, Thiabendazole, Tiagabine, Tianeptine, Tinidazole, Topiramate, Tralomethrin, Tramadol, Trandolapril, Tocainide (patient information), Tolazamide (patient information), Tolbutamide (patient information), Tolcapone (patient information), Topotecan Hydrochloride (patient information), Torsemide Oral (patient information), Tranylcypromine (patient information), Trazodone, Treprostinil, Triamterene, Trichloroethylene, Triclofos, Tricyclic antidepressant, Trimetazidine, Tripelennamine, Tropisetron, Trastuzumab (patient information), Triamcinolone Oral (patient information), Triazolam (patient information), Trifluoperazine Oral (patient information), Trihexyphenidyl (patient information), Trimeprazine (patient information), Trimethobenzamide (patient information), Trimetrexate Glucuronate (patient information), Trimipramine (patient information), Trovafloxacin (patient information), Valaciclovir, Valproic acid, Valsartan, Vancomycin, Venlafaxine, Verapamil, Valganciclovir (patient information), Vardenafil (patient information), Vicodin, Vigabatrin, Vinyl chloride, Voriconazole (patient information), Vorinostat (patient information), Zaleplon (patient information), Zanamivir Inhalation (patient information), Zidovudine Oral (patient information), Zileuton (patient information), Ziprasidone (patient information), Ziconotide, Zopiclone, Zoledronic Acid Injection (patient information), Zolmitriptan Oral (patient information), Zolpidem (patient information), Zonisamide (patient information),
Ear Nose Throat	Balance disorder, Benign paroxysmal positional vertigo, Labyrinthitis, Ménière's disease, Otitis externa, Superior canal dehiscence, Vertigo, Vestibular neuronitis,
Endocrine	No underlying causes
Environmental	Multiple chemical sensitivity, Sick building syndrome,
Gastroenterologic	Food intolerance, Gastric dumping syndrome, Proctitis, Staphylococcal enteritis,
Genetic	Chediak-Higashi disease,
Hematologic	Haemochromatosis, Leukemia, Methemoglobinemia, Polycythemia,
Iatrogenic	No underlying causes
Infectious Disease	Ebola hemorrhagic fever, Giardia lamblia, Group A streptococcal infection, Hantavirus Pulmonary Syndrome, Infectious mononucleosis, Marburg hemorrhagic fever, Rift Valley fever, Tularemia, Yellow Fever,
Musculoskeletal / Ortho	Cervical spondylosis,
Neurologic	Arnold-Chiari malformation, Multi-infarct dementia, Multiple sclerosis, Multiple system atrophy, Neuroglycopenia, Parkinson's disease, Posterior inferior cerebellar artery syndrome, Pure autonomic failure, Subdural hematoma, Syringobulbia, Transient ischaemic attack,
Nutritional / Metabolic	Hypervitaminosis A, Hypoglycemia, Thiamine (Vitamin B1) deficiency,
Obstetric/Gynecologic	Aortocaval compression syndrome, Pregnancy,
Oncologic	Adrenal metastases Colorectal cancer, Medulloblastoma,
Opthalmologic	Aneisokonia, Bifocals, Cogan syndrome, Oscillopsia, Tunnel vision,
Overdose / Toxicity	Acetylsalicylic acid Alfuzosin , Aliskiren , Atropine, Acetylene, Aniline, Benztropine Mesylate, Benzylpiperazine, Bortezomib , Buspirone , Darbepoetin Alfa , Didanosine , Doxazosin , Eugenol, Fenoprofen , Fluticasone Inhalation, Ganciclovir , Grayanotoxin, Hydrogen sulfide, Metolachlor, Midazolam, Nicotine lozenges , Oxygen toxicity, Pimozide ,
Psychiatric	Algophobia, Panic disorder, Stendhal syndrome,
Pulmonary	Hyperventilation syndrome, Respiratory alkalosis,
Renal / Electrolyte	Hemorrhagic fever with renal syndrome,
Rheum / Immune / Allergy	Takayasu arteritis, Systemic lupus erythematosus,
Sexual	Coital cephalalgia, Emergency contraception,
Trauma	Concussion, Post-concussion syndrome, Suspension trauma,
Urologic	Testicular torsion,
Miscellaneous	Altitude sickness, Chronic Fatigue Syndrome, Chronic mountain sickness, Cinchonism, Decompression sickness, Dehydration, Gulf War syndrome, Hypotension, Mal de debarquement syndrome, Motion sickness, Orthostatic hypotension, Shock, Sleep deprivation, Syncope,

Causes in Alphabetical Order

1,1,1-Trichloroethane 1,4-Dichlorobenzene 3-Quinuclidinyl benzilate 5-HT3 antagonist Abatacept Injection (patient information) Abciximab (patient information) Acamprosate (patient information) ACE inhibitor Acebutolol (patient information) Aceclofenac Acetaminophen and Codeine (patient information) Acetohexamide (patient information) Acetylene Acetylsalicylic acid (patient information) Aciclovir Acitretin (patient information) Actiq Acyclovir (patient information) Adalimumab Injection (patient information) Adrenal metastases Ajulemic acid Alatrofloxacin Injection (patient information) Albuterol (patient information) Alcohol flush reaction Aldesleukin (patient information) Alefacept Alendronate (patient information) Alfuzosin (patient information) Algophobia Aliskiren (patient information) Alprazolam (patient information) Altitude sickness Altretamine (patient information) Amantadine (patient information) Amifostine Injection (patient information) Amiloride and Hydrochlorothiazide (patient information) Amiodarone Amitriptyline (patient information) Amlodipine (patient information) Amnesic shellfish poisoning Amobarbital (patient information) Amphotericin B Injection (patient information) Ampicillin Sodium Injection (patient information) Amyl nitrite Anagrelide (patient information) Anastrozole (patient information) Aneisokonia Anesthesia Angiotensin Converting Enzyme Inhibitor (patient information) Angiotensin II receptor antagonist Aniline Antihemophilic Factor (Human) (patient information) Antihemophilic Factor (Recombinant) (patient information) Antihistamine Antimony Antiretroviral drug Aortic Stenosis Aortic valve stenosis Aortocaval compression syndrome Aprepitant (patient information) Aripiprazole (patient information) Arnold-Chiari malformation Asparaginase (patient information) Aspirin Atazanavir (patient information) Atenolol (patient information) Atorvastatin (patient information) Atovaquone (patient information) Atrial flutter Atrial myxoma Atropine Azelastine Azithromycin Baclofen Oral (patient information) Balance disorder Benazepril (patient information) Benign paroxysmal positional vertigo Benzene Benzodiazepine Benzonatate (patient information) Benztropine Mesylate Oral (patient information) Benzylpiperazine Bepridil (patient information) Bethanechol (patient information) Bevacizumab Injection (patient information) Bezafibrate (patient information) Bicalutamide (patient information) Bifocals Biperiden Bisoprolol (patient information) Bortezomib (patient information) Bosentan (patient information) Bothrops Bromocriptine Bromomethane Brompheniramine (patient information) Budesonide Inhalation Powder (patient information) Bumetanide (patient information) Bupivacaine Buprenorphine Bupropion Buspirone (patient information) Busulfan (patient information) Butabarbital (patient information) Butalbital Butanethiol Butorphanol Cabergoline Cadmium poisoning Cafergot Calanolide A Candesartan (patient information) Capecitabine (patient information) Captopril (patient information) Carbamazepine (patient information) Carbon monoxide poisoning Carboplatin (patient information) Cardiac amyloidosis Cardiomegaly Carisoprodol (patient information) Carteolol (patient information) Carvedilol (patient information) Cefaclor Centrophenoxine Cerebrovascular disease Cervical spondylosis Cetuximab Injection (patient information) Chediak-Higashi disease Chlorambucil (patient information) Chlordiazepoxide (patient information) Chloroform Chloropyramine Chlorothiazide (patient information) Chlorpheniramine (patient information) Chlorpropamide (patient information) Chlorthalidone (patient information) Chlorzoxazone (patient information) Choline Magnesium Trisalicylate (patient information) Chronic Fatigue Syndrome Chronic mountain sickness Ciclesonide Nasal Spray (patient information) Cilostazol (patient information) Cimetidine (patient information) Cinacalcet (patient information) Cinchonism Cinoxacin (patient information) Citalopram Cladribine (patient information) Clarithromycin Clemastine (patient information) Clofarabine Injection (patient information) Clofibrate (patient information) Clomipramine (patient information) Clonazepam (patient information) Clonidine Clopidogrel (patient information) Clorazepate (patient information) Codeine Oral (patient information) Cogan syndrome Coital cephalalgia Colistimethate Injection (patient information) Colofac Colorectal cancer Concussion Co-trimoxazole Injection (patient information) Cyanocobalamin Injection (patient information) Cyanogen Cyclobenzaprine (patient information) Cyclosporine (patient information) Cyproheptadine (patient information) Dacarbazine (patient information) Dactinomycin (patient information) Dalteparin Sodium Injection (patient information) Dantrolene Oral (patient information) Daptomycin Darbepoetin Alfa Injection (patient information) Decompression sickness Dehydration Desipramine Desloratadine (patient information) Desoxyn Dexamethasone Oral (patient information) Dexmethylphenidate Dextroamphetamine and Amphetamine (patient information) Dextromethorphan Dezocine Diampromide Diazepam (patient information) Dicofol Dicyclomine (patient information) Didanosine (patient information) Diethylcathinone Diethylpropion (patient information) Diflunisal (patient information) Digoxin Oral (patient information) Dihydroetorphine Diltiazem (patient information) Dimenoxadol Dinoprostone Dioxaphetyl Butyrate Diphtheria, Tetanus, and Pertussis (DTaP) Vaccine (patient information) Dipyridamole (patient information) Disopyramide (patient information) Dobutamine Hydrochloride Injection (patient information) Docetaxel (patient information) Dofetilide (patient information) Dolasetron (patient information) Donepezil (patient information) Dothiepin Doxazosin (patient information) Doxepin Duloxetine Ebola hemorrhagic fever ECA stack Efavirenz (patient information) Emergency contraception Emtricitabine (patient information) Enalapril (patient information) Enfuvirtide Injection (patient information) Enoxacin (patient information) Entacapone (patient information) Entecavir (patient information) Ephedra Ephedrine Eplerenone (patient information) Epoetin Alfa Injection (patient information) Ergotamine and Caffeine (patient information) Escitalopram Estazolam (patient information) Estrogen Eszopiclone (patient information) Etanercept Injection (patient information) Ethcathinone Ethchlorvynol Ethoheptazine Ethosuximide Ethotoin Ethylene Etodolac (patient information) Etoposide Oral and Injection (patient information) Eugenol Exemestane (patient information) Exenatide Injection (patient information) Ezetimibe (patient information)

Familial atrial fibrillation Famotidine (patient information) Felodipine (patient information) Fenofibrate (patient information) Fenoprofen (patient information) Fentanyl Citrate Injection (patient information) Fexofenadine (patient information) Fioricet Flavoxate (patient information) Floxuridine (patient information) Fluconazole Fludrocortisone Acetate (patient information) Flunitrazepam Flurazepam Fluticasone Oral Inhalation (patient information) Fluvoxamine Food intolerance Formoterol (patient information) Fosamprenavir (patient information) Fosinopril (patient information) Frovatriptan (patient information) Fulvestrant Injection (patient information) Furfural Furosemide (patient information) Gabapentin (patient information) Galantamine (patient information) Ganciclovir (patient information) Gastric dumping syndrome Gatifloxacin (patient information) Gemcitabine Hydrochloride (patient information) Gemeprost Gemfibrozil (patient information) Giardia lamblia Ginkgo Glatiramer Injection (patient information) Glimepiride (patient information) Glipizide (patient information) Glutaraldehyde Glyburide (patient information) Glycopyrrolate (patient information) Granisetron (patient information) Grayanotoxin Green Tobacco Sickness Grifulvin V Griseofulvin (patient information) Group A streptococcal infection Guanabenz (patient information) Guanethidine (patient information) Guanfacine (patient information) Gulf War syndrome Gyromitra esculenta Gyromitrin H2 antagonist Haemochromatosis Hantavirus Pulmonary Syndrome Heavy metal ingestion Hemorrhagic fever with renal syndrome Hydrazine Hydrochlorothiazide (patient information) Hydrocodone Hydrocortisone Injection (patient information) Hydrogen sulfide Hydromorphone Hydroxychloroquine (patient information) Hydroxyzine (patient information) Hyoscyamine (patient information) Hypertension Hyperventilation syndrome Hypervitaminosis A Hypoglycemia Hypotension Ibandronate (patient information) Idarubicin (patient information) Ifosfamide (patient information) Iloperidone Imatinib (patient information) Imiglucerase Injection (patient information) Imipenem and Cilastatin Sodium Injection (patient information) Imipramine Immune Globulin Intravenous Injection (patient information) Inappropriate sinus tachycardia Indapamide (patient information) Indinavir (patient information) Indometacin Indomethacin (patient information) Infectious mononucleosis Infliximab Injection (patient information) Influenza Vaccine, Inactivated (patient information) Influenza Vaccine, Live Intranasal (patient information) Insulin lispro injection (patient information) Interferon Alfa-2a and Alfa-2b Injection (patient information) Interferon Alfacon-1 Injection (patient information) Interferon beta-1a Intramuscular Injection (patient information) Iodomethane Ipratropium Oral Inhalation (patient information) Irbesartan (patient information) Isocarboxazid (patient information) Isopropyl alcohol Isoproterenol Oral Inhalation (patient information) Isosorbide (patient information) Isoxsuprine Oral (patient information) Isradipine (patient information) Itraconazole (patient information) Ivabradine Kaopectate Ketorolac Labetalol Oral (patient information) Labyrinthitis Lacosamide Lamivudine (patient information) Lamotrigine (patient information) Lanthanum (patient information) L-DOPA Lead Leflunomide (patient information) Letrozole (patient information) Leukemia Leuprolide (patient information) Levalbuterol Oral Inhalation (patient information) Levetiracetam (patient information) Levobupivacaine Levodopa and Carbidopa (patient information) Levofloxacin Oral (patient information) Levomethadyl (patient information) Levorphanol Oral (patient information) Lidocaine Lindane (patient information) Lisinopril (patient information) Lithium Lomotil Lomustine (patient information) Loop diuretic Loratadine (patient information) Lorazepam (patient information) Losartan Losartan (patient information) Loxapine Oral (patient information) Lysuride Magnesium gluconate (patient information) Magnesium oxide (patient information) Mal de debarquement syndrome Malaria prophylaxis Maprotiline Marburg hemorrhagic fever Marine toxins Mebutamate Mechlorethamine (patient information) Medroxyprogesterone (patient information) Medulloblastoma Mefenamic Acid (patient information) Mefloquine (patient information) Megestrol (patient information) Melphalan (patient information) Memantine Ménière's disease Meperidine (patient information) Mercaptopurine Meropenem Injection (patient information) Mesoridazine Oral (patient information) Metaproterenol (patient information) Metaxalone (patient information) Metethoheptazine Metformin (patient information) Methemoglobinemia Metheptazine Methimazole (patient information) Methocarbamol Oral (patient information) Methotrexate (patient information) Methoxsalen Methyclothiazide (patient information) Methyldopa Methylergonovine Methylphenidate Methylprednisolone Oral (patient information) Methyprylon Metipranolol Ophthalmic (patient information) Metoclopramide Metolachlor Metolazone (patient information) Metoprolol (patient information) Metronidazole Mexiletine Midazolam Mifepristone Miglitol (patient information) Minocycline Injection Minoxidil Oral (patient information) Mitomycin (patient information) Modafinil (patient information) Moexipril (patient information) Moricizine (patient information) Morphine Oral (patient information) Motion sickness Motofen Moxonidine Multi-infarct dementia Multiple chemical sensitivity Multiple sclerosis Multiple system atrophy Mushroom poisoning Mycophenolate (patient information) Nabilone (patient information) Nabumetone (patient information) Nadolol (patient information) Nalbuphine Nalmefene Naratriptan (patient information) Natalizumab injection (patient information) Nateglinide oral (patient information) Nebivolol Nelfinavir (patient information) N-Ethyl-3-piperidyl benzilate Neuroglycopenia Nevirapine (patient information) Niaprazine Nicardipine (patient information) Nicotine gum (patient information) Nicotine lozenges (patient information) Nifedipine (patient information) Nilutamide (patient information) Nimodipine (patient information) Nisoldipine (patient information) Nitrazepam Nitrous oxide Nizatidine (patient information) N-Methyl-3-piperidyl benzilate Norethindrone (patient information) Norplant Nutmeg Ofloxacin oral (patient information) Olanzapine (patient information) Olmesartan (patient information) Omalizumab injection (patient information) Omeprazole (patient information) Ondansetron (patient information) Opioid Orphenadrine (patient information) Orthostatic hypotension Oscillopsia Oseltamivir (patient information) Otitis externa Oxacillin Sodium Injection (patient information) Oxaliplatin injection (patient information) Oxamniquine

Oxazepam (patient information) Oxcarbazepine (patient information) Oxybutynin (patient information) Oxygen toxicity Paclitaxel (patient information) Paliperidone (patient information) Pamidronate injection (patient information) Panic disorder Parkinson's disease Paroxetine Pegaspargase (patient information) Peginterferon alfa-2a (patient information) Peginterferon alfa-2b (patient information) Pemetrexed injection (patient information) Pemoline (patient information) Penbutolol (patient information) Pentamidine Pentazocine and naloxone (patient information) Pentosan polysulfate (patient information) Pentostatin (patient information) Pentoxifylline (patient information) Pergolide (patient information) Perhexiline Perindopril (patient information) Peripheral Arterial Disease Perphenazine oral (patient information) Phenampromide Phenazepam Phenazopyridine (patient information) Phenelzine Phenobarbital Phenoxybenzamine (patient information) Phentermine Phenylephrine (patient information) Phenytoin Pholcodine Pilocarpine ophthalmic (patient information) Pimozide (patient information) Pindolol (patient information) Pioglitazone (patient information) Pirbuterol acetate oral inhalation (patient information) Piribedil Piroxicam Pizotifen Plicamycin (patient information) Polycythemia Posaconazole (patient information) Post-concussion syndrome Posterior inferior cerebellar artery syndrome Pramipexole (patient information) Pramlintide injection (patient information) Prazepam (patient information) Praziquantel Prazosin (patient information) Pregabalin Pregabalin (patient information) Pregnancy Primaquine (patient information) Probenecid (patient information) Procainamide (patient information) Procarbazine (patient information) Proctitis Proheptazine Promethazine Propafenone Propantheline (patient information) Propiram Propoxyphene (patient information) Propranolol Oral (patient information) Propylthiouracil (patient information) Protriptyline (patient information) Pseudoephedrine Psychiatric conditions Pulmonary hypertension Pulmonary valve stenosis Pure autonomic failure Quazepam Quetiapine Quinapril Quinethazone Quinidine Oral (patient information) Quinoline Rabeprazole (patient information) Ramelteon (patient information) Ramipril Ranibizumab injection (patient information) Ranitidine hydrochloride injection (patient information) Ranolazine (patient information) Rasagiline (patient information) Reactive hypoglycemia Reboxetine Remacemide Remifentanil Repaglinide (patient information) Reserpine Respiratory alkalosis Ribavirin (patient information) Rift Valley fever Riluzole (patient information) Risedronate (patient information) Risperidone (patient information) Ritonavir (patient information) Rituximab injection (patient information) Rivastigmine (patient information) Rizatriptan (patient information) Roflumilast Ropinirole (patient information) Ropivacaine Rosiglitazone (patient information) Rosuvastatin (patient information) Roxithromycin Rubbing alcohol Salmeterol oral inhalation (patient information) Salsalate (patient information) Saquinavir (patient information) Sargramostim injection (patient information) Scombroid food poisoning Scopolamine patch (patient information) Secobarbital Second Degree AV Block Selegiline (patient information) Shock Sibutramine (patient information) Sick building syndrome Sick sinus syndrome Sildenafil (patient information) Sinus bradycardia Sitaxsentan Sleep deprivation Sodium oxybate (patient information) Sodium stibogluconate Solanine Solifenacin (patient information) Sotalol (patient information) Sparfloxacin (patient information) Spironolactone (patient information) SSRI discontinuation syndrome Staphylococcal enteritis Stendhal syndrome Stimulant laxatives (patient information) Subdural hematoma Sulfadiazine (patient information) Sulfisoxazole (patient information) Sulindac (patient information) Sulprostone Sumatriptan Superior canal dehiscence Supraventricular tachycardia Suspension trauma Syncope Syringobulbia Systemic lupus erythematosus Takayasu arteritis Tamoxifen (patient information) Tamsulosin (patient information) Tapentadol Tegaserod (patient information) Telbivudine (patient information) Telithromycin (patient information) Telmisartan (patient information) Temazepam Temozolomide (patient information) Teniposide (patient information) Terbutaline (patient information) Teriparatide (rDNA origin) Injection (patient information) Testicular torsion Testosterone Transdermal (patient information) Tetrabenazine Tetrahydrocannabinol Thiabendazole Thiamine (Vitamin B1) deficiency Thioridazine (patient information) Thiotepa (patient information) Thiothixene Oral (patient information) Tiagabine Tianeptine Ticarcillin Disodium Injection (patient information) Tiludronate (patient information) Timolol Oral (patient information) Tinidazole Tizanidine (patient information) Tocainide (patient information) Tolazamide (patient information) Tolbutamide (patient information) Tolcapone (patient information) Topiramate Topotecan Hydrochloride (patient information) Torsemide Oral (patient information) Tralomethrin Tramadol Trandolapril Transient ischaemic attack Tranylcypromine (patient information) Trastuzumab (patient information) Trazodone Treprostinil Triamcinolone Oral (patient information) Triamterene Triazolam (patient information) Trichloroethylene Triclofos Tricyclic antidepressant Trifluoperazine Oral (patient information) Trihexyphenidyl (patient information) Trimeprazine (patient information) Trimetazidine Trimethobenzamide (patient information) Trimetrexate Glucuronate (patient information) Trimipramine (patient information) Tripelennamine Tropisetron Trovafloxacin (patient information) Tularemia Tunnel vision Vagal episode Valaciclovir Valganciclovir (patient information) Valproic acid Valsartan Vancomycin Vardenafil (patient information) Venlafaxine Verapamil Vertigo Vestibular neuronitis Vicodin Vigabatrin Vinyl chloride Viral Hemorrhagic Fever Voriconazole (patient information) Vorinostat (patient information) Wolff-Parkinson-White Syndrome Yellow Fever Zaleplon (patient information) Zanamivir Inhalation (patient information) Ziconotide Zidovudine Oral (patient information) Zileuton (patient information) Ziprasidone (patient information) Zoledronic Acid Injection (patient information) Zolmitriptan Oral (patient information) Zolpidem (patient information) Zonisamide (patient information) Zopiclone

Risk Factors

People with heart problems

• Stroke
• Multiple sclerosis
• Seizures
• Brain tumors
• Benign positional vertigo
• Labyrinthitis

Related Chapters

• Motion sickness
• Balance disorder
• Vertigo
• Pre-syncope
• Disequilibrium

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