NARATRIPTAN (naratriptan hydrochloride) · ORBION PHARMS

Absorption: Naratriptan is well absorbed, with about 70% oral bioavailability. Following administration of a 2.5-mg tablet, the peak concentrations are obtained in 2 to 3 hours. After administration of 1-or 2.5-mg tablets, the C max is somewhat (about 50%) higher in women (not corrected for milligram-per-kilogram dose) than in men. During a migraine attack, absorption is slower, with a T max of 3 to 4 hours. Food does not affect the pharmacokinetics of naratriptan. Naratriptan displays linear ki...

The efficacy of naratriptan in the acute treatment of migraine headaches was evaluated in 3 randomized, double-blind, placebo-controlled trials in adult patients (Trials 1, 2, 3). These trials enrolled adult patients who were predominantly female (86%) and Caucasian (96%) with a mean age of 41 years (range: 18 to 65 years). In all studies, patients were instructed to treat at least 1 moderate to severe headache. Headache response, defined as a reduction in headache severity from moderate or severe pain to mild or no pain, was assessed up to 4 hours after dosing. Associated symptoms such as nau...

The following adverse reactions are discussed in more detail in other sections of the prescribing information: 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 [s ee Warnings and Precautions (5.5) ] Medication o...

Naratriptan tablets are contraindicated in patients with: Ischemic coronary artery disease (CAD) (angina pectoris, history of myocardial infarction, or documented silent ischemia) or coronary artery vasospasm, including Prinzmetal's angina [see Warnings and Precautions (5.1) ] Wolff-Parkinson-White syndrome or arrhythmias associated with other cardiac accessory conduction pathway disorders [see Wa...

Myocardial ischemia/infarction and Prinzmetal's angina: Perform cardiac evaluation in patients with multiple cardiovascular risk factors. ( 5.1 ) Arrhythmias: Discontinue naratriptan if occurs . ( 5.2 ) Chest/throat/neck/jaw pain, tightness, pressure, or heaviness: Generally not associated with myocardial ischemia; evaluate for CAD in patients at high risk. ( 5.3 ) Cerebral hemorrhage, subarachnoid hemorrhage, and stroke: Discontinue naratriptan if occurs . ( 5.4 ) Gastrointestinal ischemic reac...

7 DRUG INTERACTIONS 7.1 Ergot-Containing Drugs Ergot-containing drugs have been reported to cause prolonged vasospastic reactions. Because these effects may be additive, use of ergotamine-containing or ergot-type medications (like dihydroergotamine or methysergide) and naratriptan within 24 hours of each other is contraindicated. 7.2 Other 5-HT 1 Agonists Concomitant use of other 5-HT 1B/1D agonis...