اميجراويست 2.5 مجم 4 اقراص

12.1 Mechanism of Action Zolmitriptan binds with high affinity to human recombinant 5-HT 1D and 5-HT 1B receptors, and moderate affinity for 5-HT 1A receptors. The N-desmethyl metabolite also has high affinity for 5-HT 1B/1D and moderate affinity for 5-HT1A receptors. Current theories proposed to explain the etiology of migraine headache suggest that symptoms are due to local cranial vasodilatation and/or to the release of sensory neuropeptides (vasoactive intestinal peptide, substance P and calcitonin gene-related peptide) through nerve endings in the trigeminal system. The therapeutic activity of zolmitriptan for the treatment of migraine headache is thought to be due to the agonist effects at the 5-HT 1B/1D receptors on intracranial blood vessels (including the arterio-venous anastomoses) and sensory nerves of the trigeminal system which result in cranial vessel constriction and inhibition of pro-inflammatory neuropeptide release.

ZOLMITRIPTAN NASAL SPRAY is indicated for the acute treatment of migraine with or without aura in adults and pediatric patients 12 years of age and older. Limitations of Use Only use ZOLMITRIPTAN NASAL SPRAY if a clear diagnosis of migraine has been established. If a patient has no response to ZOLMITRIPTAN NASAL SPRAY treatment for the first migraine attack, reconsider the diagnosis of migraine before ZOLMITRIPTAN NASAL SPRAY is administered to treat any subsequent attacks. ZOLMITRIPTAN NASAL SPRAY is not indicated for the prevention of migraine attacks. Safety and effectiveness of ZOLMITRIPTAN NASAL SPRAY have not been established for cluster headache. Not recommended in patients with moderate or severe hepatic impairment [see (2.2) ] . ZOLMITRIPTAN NASAL SPRAY is a serotonin (5-HT) 1B/1D receptor agonist (triptan) indicated for the acute treatment of migraine with or without aura in adults and pediatric patients 12 years and older (1) Limitations of Use: Use only after a clear diagnosis of migraine has been established (1) Not intended for the prophylactic therapy of migraine (1) Not indicated for the treatment of cluster headache (1) Not recommended in patients with moderate to severe hepatic impairment (1)

Recommended starting dose: 2.5 mg (2.1) Maximum single dose: 5 mg (2.1) May repeat dose after 2 hours if needed; not to exceed 10 mg in any 24-hour period (2.1) 2.1 Dosing Information The recommended starting dose for ZOLMITRIPTAN NASAL SPRAY in adult and pediatric patients 12 years of age and older is 2.5 mg. As the individual response to ZOLMITRIPTAN NASAL SPRAY may vary, the dose should be adjusted on an individual basis. The maximum recommended single dose of ZOLMITRIPTAN NASAL SPRAY is 5 mg. If the migraine has not resolved by 2 hours after taking ZOLMITRIPTAN NASAL SPRAY, or returns after a transient improvement, another dose may be administered at least 2 hours after the previous dose. The maximum daily dose should not exceed 10 mg in any 24-hour period. The safety of ZOLMITRIPTAN NASAL SPRAY in the treatment of an average of more than four headaches in a 30-day period has not been established. 2.2 Dosing in Patients with Hepatic Impairment ZOLMITRIPTAN NASAL SPRAY is not recommended in patients with moderate to severe hepatic impairment because of increased zolmitriptan blood levels in these patients and elevation of blood pressure in some of these patients. The recommended dosage of ZOLMITRIPTAN NASAL SPRAY in patients with mild hepatic impairment is the same as for patients with normal hepatic function [see (2.1) , (5.8) , (8.6) and Clinical Pharmacology (12.3) ] . 2.3 Dosing in Patients taking Cimetidine If ZOLMITRIPTAN NASAL SPRAY is co-administered with cimetidine, limit the maximum single dose of ZOLMITRIPTAN NASAL SPRAY to 2.5 mg, not to exceed 5 mg in any 24-hour period [see (7.4) and Clinical Pharmacology (12.3)] .

The following are discussed in more detail in other sections of labeling: Myocardial Ischemia, Myocardial Infarction, and Prinzmetal's Angina [see (5.1) ] Arrhythmias [see (5.2) ] Chest, Throat, Neck and/or Jaw Pain/Tightness/Pressure [see (5.3)] Cerebrovascular Events [see (5.4)] Other Vasospasm Reactions [see (5.5)] Medication Overuse Headache [see (5.6) ] Serotonin Syndrome [see (5.7) ] Increase in Blood Pressure [see (5.8) ] The most common (≥ 5% and > placebo) were: Adults: unusual taste, paresthesia, dizziness, and hyperesthesia (6.1) Pediatrics: unusual taste (6.1) To report SUSPECTED , contact Amneal Pharmaceuticals at 1-877-835-5472 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 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 Among 460 patients treating 1180 single attacks with zolmitriptan nasal spray in a blinded placebo controlled trial (Study 1), there was a low withdrawal rate related to : 5 mg (1.3%), 2.5 mg (0%), and placebo (0.4%). None of the withdrawals were due to a serious event. One patient was withdrawn due to abnormal ECG changes from baseline that were incidentally found 23 days after the last dose of zolmitriptan nasal spray. The most common (≥ 5% and > placebo) in any dosage strength in clinical trials for zolmitriptan nasal spray were: unusual taste, paresthesia, hyperesthesia, and dizziness. The incidence of was generally dose-related. Table 1 lists the from the controlled clinical trial (Study 1) that occurred in ≥ 2% of patients in either the 2.5 or 5 mg zolmitriptan nasal spray dose groups and with an incidence greater than placebo. Table 1: in a Placebo-Controlled Study in Adult Patients with Migraine (Study 1) Body System Adverse Reaction Placebo (N=228) Zolmitriptan 2....

Zolmitriptan is contraindicated in patients with: Ischemic coronary artery disease (angina pectoris, history of myocardial infarction, or documented silent ischemia), other significant underlying cardiovascular disease, or coronary artery vasospasm including Prinzmetal's angina [see (5.1) ] Wolff-Parkinson-White Syndrome or arrhythmias associated with other cardiac accessory conduction pathway disorders [see (5.2) ] History of stroke, transient ischemic attack (TIA) or history of hemiplegic or basilar migraine because these patients are at higher risk of stroke [see (5.4) ] Peripheral vascular disease (PVD) [see (5.5) ] Ischemic bowel disease [see (5.5) ] Uncontrolled hypertension [see (5.8) ] Recent use (i.e., within 24 hours) of another 5-HT 1 agonist, ergotamine-containing medication, or ergot-type medication (such as dihydroergotamine or methysergide) [see (7.1 , 7.3) ] Concurrent administration of an MAO-A inhibitor or recent discontinuation of a MAO-A inhibitor (that is within 2 weeks) [see (7.2) and Clinical Pharmacology (12.3) ] Known hypersensitivity to zolmitriptan (angioedema and anaphylaxis seen) [see (6.2) ] History of ischemic heart disease or coronary artery vasospasm (4) Symptomatic Wolff-Parkinson-White syndrome or other cardiac accessory conduction pathway disorders (4) History of stroke, transient ischemic attack, or hemiplegic or basilar migraine (4) Peripheral Vascular Disease (4) Ischemic bowel disease (4) Uncontrolled hypertension (4) Recent (within 24 hours) use of another 5-HT 1 agonist (e.g., another triptan) or of an ergot-type medication (4) MAO-A inhibitor used in past 2 weeks (4) Hypersensitivity to zolmitriptan (4)