Rizatriptan adverse reactions

Rizatriptan
MAXALT® FDA Package Insert
Indications and Usage
Dosage and Administration
Dosage Forms and Strengths
Contraindications
Warnings and Precautions
Adverse Reactions
Drug Interactions
Use in Specific Populations
Overdosage
Description
Clinical Pharmacology
Nonclinical Toxicology
Clinical Studies
How Supplied/Storage and Handling
Patient Counseling Information
Labels and Packages
Clinical Trials on Rizatriptan
ClinicalTrials.gov

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Adverse Reactions

The following adverse reactions are discussed in more detail in other sections of the labeling:

Myocardial Ischemia, Myocardial Infarction, and Prinzmetal's Angina [see Warnings and Precautions (5.1)]. Arrhythmias [see Warnings and Precautions (5.2)]. Chest, Throat, Neck and/or Jaw Pain/Tightness/Pressure [see Warnings and Precautions (5.3)]. Cerebrovascular Events [see Warnings and Precautions (5.4)]. Other Vasospasm Reactions [see Warnings and Precautions (5.5)]. Medication Overuse Headache [see Warnings and Precautions (5.6)]. Serotonin Syndrome [see Warnings and Precautions (5.7)]. Increase in Blood Pressure [see Warnings and Precautions (5.8)].

6.1 Clinical Trials Experience

Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.

Adults

Incidence in Controlled Clinical Trials

Adverse reactions to MAXALT were assessed in controlled clinical trials that included over 3700 adult patients who received single or multiple doses of MAXALT Tablets. The most common adverse reactions during treatment with MAXALT (≥5% in either treatment group and greater than placebo) were asthenia/fatigue, somnolence, pain/pressure sensation and dizziness. These adverse reactions appeared to be dose related.

Table 1 lists the adverse reactions (incidence ≥2% and greater than placebo) after a single dose of MAXALT in adults.

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The frequencies of adverse reactions in clinical trials did not increase when up to three doses were taken within 24 hours. Adverse reaction frequencies were also unchanged by concomitant use of drugs commonly taken for migraine prophylaxis (including propranolol), oral contraceptives, or analgesics. The incidences of adverse reactions were not affected by age or gender. There were insufficient data to assess the impact of race on the incidence of adverse reactions.

Other Events Observed in Association with the Administration of MAXALT in Adults

In the following section, the frequencies of less commonly reported adverse events are presented that were not reported in other sections of the labeling. Because the reports include events observed in open studies, the role of MAXALT in their causation cannot be reliably determined. Furthermore, variability associated with adverse event reporting, the terminology used to describe adverse events, limit the value of the quantitative frequency estimates provided. Event frequencies are calculated as the number of patients who used MAXALT and reported an event divided by the total number of patients exposed to MAXALT (N=3716). All reported events occurred at an incidence ≥1%, or are believed to be reasonably associated with the use of the drug. Events are further classified within body system categories and enumerated in order of decreasing frequency using the following definitions: frequent adverse events are those defined as those occurring in at least (>)1/100 patients; infrequent adverse experiences are those occurring in 1/100 to 1/1000 patients; and rare adverse experiences are those occurring in fewer than 1/1000 patients.

General: Infrequent was facial edema. Rare were syncope and edema/swelling. Atypical Sensations: Frequent were warm sensations. Cardiovascular: Frequent was palpitation. Infrequent were tachycardia, cold extremities, and bradycardia. Digestive: Frequent were diarrhea and vomiting. Infrequent were dyspepsia, tongue edema and abdominal distention. Musculoskeletal: Infrequent were muscle weakness, stiffness, myalgia and muscle cramp/spasm. Neurological/Psychiatric: Frequent were hypoesthesia, euphoria and tremor. Infrequent were vertigo, insomnia, confusion/disorientation, gait abnormality, memory impairment, and agitation. Respiratory: Frequent was dyspnea. Infrequent was pharyngeal edema. Special Senses: Infrequent were blurred vision and tinnitus. Rare was eye swelling. Skin and Skin Appendage: Frequent was flushing. Infrequent were sweating, pruritus, rash, and urticaria. Rare was erythema, hot flashes.

The adverse reaction profile seen with MAXALT-MLT Orally Disintegrating Tablets was similar to that seen with MAXALT Tablets.

Incidence in Controlled Clinical Trials in Pediatric Patients

Adverse reactions to MAXALT-MLT were assessed in a controlled clinical trial in the acute treatment of migraines (Study 7) that included a total of 1382 pediatric patients 6-17 years of age, of which 977 (72%) administered at least one dose of study treatment (MAXALT-MLT and/or placebo) [see Clinical Studies (14.2)]. The incidence of adverse reactions reported for pediatric patients in the acute clinical trial was similar in patients who received MAXALT to those who received placebo. The adverse reaction pattern in pediatric patients is expected to be similar to that in adults.

Other Events Observed in Association with the Administration of MAXALT-MLT in Pediatric Patients

In the following section, the frequencies of less commonly reported adverse events are presented. Because the reports include events observed in open studies, the role of MAXALT-MLT in their causation cannot be reliably determined. Furthermore, variability associated with adverse event reporting, the terminology used to describe adverse events, limit the value of the quantitative frequency estimates provided.

Event frequencies are calculated as the number of pediatric patients 6 to 17 years of age who used MAXALT-MLT and reported an event divided by the total number of patients exposed to MAXALT-MLT (N=1068). All reported events occurred at an incidence ≥1%, or are believed to be reasonably associated with the use of the drug. Events are further classified within system organ class and enumerated in order of decreasing frequency using the following definitions: frequent adverse events are those occurring in (>)1/100 pediatric patients; infrequent adverse experiences are those occurring in 1/100 to 1/1000 pediatric patients; and rare adverse experiences are those occurring in fewer than 1/1000 patients.

General: Frequent was fatigue. Ear and labyrinth disorders: Infrequent was hypoacusis. Gastrointestinal disorders: Frequent was abdominal discomfort. Nervous system disorders: Infrequent were coordination abnormal, disturbance in attention, and presyncope. Psychiatric disorders: Infrequent was hallucination.

6.2 Postmarketing Experience

The following section enumerates potentially important adverse events that have occurred in clinical practice and which have been reported spontaneously to various surveillance systems. The events enumerated include all except those already listed in other sections of the labeling or those too general to be informative. Because the reports cite events reported spontaneously from worldwide postmarketing experience, frequency of events and the role of MAXALT in their causation cannot be reliably determined.

Neurological/Psychiatric: Seizure. General: Allergic conditions including anaphylaxis/anaphylactoid reaction, angioedema, wheezing, and toxic epidermal necrolysis [see Contraindications (4)]. Special Senses: Dysgeusia.

References

Adapted from the FDA Package Insert.