ZOLMITRIPTAN

ZOLMITRIPTAN- zolmitriptan tablet, film coated
Camber Pharmaceuticals Inc

1. INDICATIONS AND USAGE

Zolmitriptan tablets are indicated for the acute treatment of migraine with or without aura in adults.

Limitations of Use

  • Only use zolmitriptan tablets if a clear diagnosis of migraine has been established. If a patient has no response to zolmitriptan tablets treatment for the first migraine attack, reconsider the diagnosis of migraine before zolmitriptan tablets are administered to treat any subsequent attacks.
  • Zolmitriptan tablets are not indicated for the prevention of migraine attacks.
  • Safety and effectiveness of zolmitriptan tablets have not been established for cluster headache.

2. DOSAGE AND ADMINISTRATION

2.1 Dosing Information

The recommended starting dose of zolmitriptan tablets is 1.25 mg or 2.5 mg. The 1.25 mg dose can be achieved by manually breaking the functionally-scored 2.5 mg tablet in half. The maximum recommended single dose of zolmitriptan tablets is 5 mg.

In controlled clinical trials, a greater proportion of patients had headache response following a 2.5 mg or 5 mg dose than following a 1 mg dose. There was little added benefit from the 5 mg dose compared to the 2.5 mg dose, but adverse reactions were more frequent with the 5 mg dose.

If the migraine has not resolved by 2 hours after taking zolmitriptan tablets, or returns after a transient improvement, a second dose may be administered at least 2 hours after the first dose. The maximum daily dose is 10 mg in any 24-hour period.

The safety of zolmitriptan tablets in the treatment of an average of more than three migraines in a 30-day period has not been established.

2.3 Dosing in Patients with Hepatic Impairment

The recommended dose of zolmitriptan tablets in patients with moderate to severe hepatic impairment is 1.25 mg (one-half of one 2.5 mg zolmitriptan tablet) because of increased zolmitriptan blood levels in these patients and elevation of blood pressure in some of these patients. Limit the total daily dose in patients with severe hepatic impairment to no more than 5 mg per day.

2.4 Dosing in Patients taking Cimetidine

If zolmitriptan tablets are co-administered with cimetidine, limit the maximum single dose of zolmitriptan tablets to 2.5 mg, not to exceed 5 mg in any 24-hour period [see Drug Interactions (7.5), Clinical Pharmacology (12.3)].

3. DOSAGE FORMS AND STRENGTHS

2.5 mg Tablets: Yellow, film-coated, round, biconvex tablets debossed with ‘I ’ on the left side and ‘G ’ on the right side of functional score on one side and ‘458 ’ on the other.

5 mg Tablets: Pink, film-coated, round, biconvex tablets debossed with ‘IG ’ on one side and ‘459 ’ on the other.

4. CONTRAINDICATIONS

Zolmitriptan tablets are 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 Warnings and Precautions (5.1) ]
  • Wolff-Parkinson-White syndrome or arrhythmias associated with other cardiac accessory conduction pathway disorders [see Warnings and Precautions (5.2) ]
  • History of stroke, transient ischemic attack (TIA), or history of hemiplegic or basilar migraine because these patients are at a higher risk of stroke [see Warnings and Precautions (5.4) ]
  • Peripheral vascular disease (PVD) [see Warnings and Precautions (5.5) ]
  • Ischemic bowel disease [see Warnings and Precautions (5.5) ]
  • Uncontrolled hypertension [see Warnings and Precautions (5.8) ]
  • Recent use (i.e., within 24 hours) of another 5-HT1 agonist, ergotamine-containing medication, or ergot-type medication (such as dihydroergotamine or methysergide) [see Drug Interactions (7.1, 7.3)]
  • Concurrent administration of a monoamine oxidase (MAO)-A inhibitor or recent use of a MAO-A inhibitor (that is within 2 weeks) [see Drug Interactions (7.2) and Clinical Pharmacology (12.3)]
  • Known hypersensitivity to zolmitriptan tablets (angioedema and anaphylaxis seen) [see Adverse Reactions (6.2) ]

5. WARNINGS AND PRECAUTIONS

5.1 Myocardial Ischemia, Myocardial Infarction, and Prinzmetal Angina

Zolmitriptan tablets are contraindicated in patients with ischemic or vasospastic coronary artery disease (CAD). There have been rare reports of serious cardiac adverse reactions, including acute myocardial infarction, occurring within a few hours following administration of zolmitriptan tablets. Some of these reactions occurred in patients without known CAD. 5-HT1 agonists including zolmitriptan tablets may cause coronary artery vasospasm (Prinzmetal Angina), even in patients without a history of CAD.

Perform a cardiovascular evaluation in triptan-naïve patients who have multiple cardiovascular risk factors (e.g., increased age, diabetes, hypertension, smoking, obesity, strong family history of CAD) prior to receiving zolmitriptan tablets. Do not administer zolmitriptan tablets if there is evidence of CAD or coronary artery vasospasm [see Contraindications (4)]. For patients with multiple cardiovascular risk factors who have a negative cardiovascular evaluation, consider administering the first zolmitriptan tablets dose in a medically-supervised setting and performing an electrocardiogram (ECG) immediately following zolmitriptan tablets administration. For such patients, consider periodic cardiovascular evaluation in intermittent long-term users of zolmitriptan tablets.

5.2 Arrhythmias

Life-threatening disturbances of cardiac rhythm including ventricular tachycardia and ventricular fibrillation leading to death have been reported within a few hours following the administration of 5-HT1 agonists. Discontinue zolmitriptan tablets if these disturbances occur. Zolmitriptan tablets are contraindicated in patients with Wolff-Parkinson-White syndrome or arrhythmias associated with other cardiac accessory conduction pathway disorders [see Contraindications (4) ].

5.3 Chest, Throat, Neck and Jaw Pain/Tightness/Pressure

As with other 5-HT1 agonists, sensations of tightness, pain, and pressure in the chest, throat, neck, and jaw commonly occur after treatment with zolmitriptan tablets and is usually non-cardiac in origin. However, perform a cardiac evaluation if these patients are at high cardiac risk. 5-HT1 agonists including zolmitriptan tablets are contraindicated in patients with CAD or Prinzmetal’s variant angina [see Contraindications (4) ].

5.4 Cerebrovascular Events

Cerebral hemorrhage, subarachnoid hemorrhage, and stroke have occurred in patients treated with 5-HT1 agonists, and some have resulted in fatalities. In a number of cases, it appears possible that the cerebrovascular events were primary, the 5-HT1 agonist having been administered in the incorrect belief that the symptoms experienced were a consequence of migraine, when they were not.

As with other acute migraine therapies, before treating headaches in patients not previously diagnosed as migraineurs, and in migraineurs who present with symptoms atypical for migraine, exclude other potentially serious neurological conditions. Zolmitriptan tablets are contraindicated in patients with a history of stroke or transient ischemic attack [see Contraindications (4) ].

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