Meclizine

Meclizine

File:Meclizine.svg
Clinical data
Pregnancy category	B
Routes of administration	Oral
ATC code	A04AB04 (WHO) R06AE05 (WHO)
Pharmacokinetic data
Elimination half-life	6 hours
Identifiers
IUPAC name 1-[(4-chlorophenyl)- phenyl-methyl]-4- [(3-methylphenyl)methyl]piperazine
CAS Number	569-65-3
PubChem CID	4034
DrugBank	APRD00354
E number	{{#property:P628}}
ECHA InfoCard	{{#property:P2566}}
Chemical and physical data
Formula	C25H27ClN2
Molar mass	390.948 g/mol

Meclizine (proposed INN is meclozine) is an antihistamine considered to be an antiemetic. It is most commonly used to inhibit nausea and vomiting. An alternative to dimenhydrinate (Dramamine), meclizine is considered to be equally effective, but with reduced side effects.

Uses

Motion sickness

Meclizine is effective in inhibiting the symptoms of motion sickness, such as nausea, vomiting, and dizziness.

Vertigo

Meclizine may be effective in relieving vertigo experienced as a result of inner ear infections or other conditions.

Risks of use

Drowsiness

Drowsiness may result as a side effect of taking meclizine. While the effects are less than dimenhydrinate, users are advised not to operate heavy machinery while under the influence. The consumption of alcohol while under the influence of meclizine may result in additional drowsiness.

Pregnancy

Meclizine is classified as Pregnancy Category B by the FDA.

Category B: Animal reproduction studies have failed to demonstrate a risk to the fetus and there are no adequate and well-controlled studies in pregnant women.

Studies have shown that cleft palates of fetuses were formed when pregnant rats were exposed to 25-50 times a normal dosage. Thus, pregnant women are advised not to take meclizine unless it is absolutely necessary.

Anticholinergics

Due to its possible anticholinergic action, meclizine should be used carefully with patients who suffer from asthma, glaucoma, or an enlarged prostate gland.

Commercial names

Meclizine hydrochloride is sold under the commercial names

• Dramamine II®
• Dramamine Less Drowsy®
• Antivert®
• Bonine®
• Bonamine®
• Bonikraft®
• Emetostop®
• Medivert®
• Sea-Legs®
• Agyrax®
• Postafen® (Sweden)

External links

• [1] – University of Berlin's Institute of Biochemistry
• [2] – Numark Pharmacies Information Page on Meclizine
• [3] Rxlist Medical Dictionary