Almotriptan

Do not use almotriptan tablets and ergotamine-containing or ergot-type medications within 24 hours of each other ( 4.5 , 7.1 ) Do not use almotriptan tablets and other 5-HT 1 agonists (e.g., triptans) within 24 hours of each other ( 4.6 , 7.2 ) SSRI or SNRI: life-threatening serotonin syndrome reported during combined use with triptans ( 5.5 , 7.3 ) Ketoconazole: use single dose of almotriptan tablets 6.25 mg; maximum almotriptan tablets daily dose 12.5 mg ( 7.4 )

7.1 Ergot-Containing Drugs These drugs have been reported to cause prolonged vasospastic reactions. Because, in theory, vasospastic effects may be additive, ergotamine-containing or ergot-type medications (like dihydroergotamine, ergotamine tartrate, or methysergide) and almotriptan tablets should not be used within 24 hours of each other [see Contraindications ( 4.5 )] . 7.2 5-HT1 Agonists (e.g., Triptans) Concomitant use of other 5-HT 1 agonists (e.g., triptans) within 24 hours of treatment with almotriptan tablets is contraindicated [see Contraindications ( 4.6 )] .

7.3 Selective Serotonin Reuptake Inhibitors/Serotonin Norepinephrine Reuptake Inhibitors Cases of life-threatening serotonin syndrome have been reported during combined use of triptans and selective serotonin reuptake inhibitors (SSRIs) or serotonin norepinephrine reuptake inhibitors (SNRIs) [see Warnings and Precautions ( 5.5 ), Clinical Pharmacology ( 12.3 )] .

7.4 Ketoconazole and Other Potent CYP3A4 Inhibitors Co-administration of almotriptan and oral ketoconazole, a potent CYP3A4 inhibitor, resulted in an approximately 60% increase in exposure of almotriptan. Increased exposures to almotriptan may be expected when almotriptan is used concomitantly with other potent CYP3A4 inhibitors [see Clinical Pharmacology ( 12.3 )] . In patients concomitantly using potent CYP3A4 inhibitors, the recommended starting dose of almotriptan tablets is 6.25 mg. The maximum daily dose should not exceed 12.5 mg within a 24-hour period.

Concomitant use of almotriptan tablets and potent CYP3A4 inhibitors should be avoided in patients with renal or hepatic impairment [see Clinical Pharmacology ( 12.3 )] .

8.1 Pregnancy Pregnancy Category C In animal studies, almotriptan produced developmental toxicity (increased embryolethality and fetal skeletal variations, and decreased offspring body weight) at doses greater than those used clinically. There are no adequate and well-controlled studies in pregnant women; therefore, almotriptan tablets should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

When almotriptan (125, 250, 500, or 1000 mg/kg/day) was administered orally to pregnant rats throughout the period of organogenesis, increased incidences of fetal skeletal variations (decreased ossification) were noted at a dose of 250 mg/kg/day or greater and an increase in embryolethality was seen at the highest dose. The no-effect dose for embryo-fetal developmental toxicity in rats (125 mg/kg/day) is approximately 100 times the maximum recommended human dose (MRHD) of 25 mg/day on a body surface area (mg/m 2 ) basis. Similar studies in pregnant rabbits conducted with almotriptan (oral doses of 5, 20, or 60 mg/kg/day) demonstrated increases in embryolethality at the highest dose.

The no-effect dose for embryo-fetal developmental toxicity in rabbits (20 mg/kg/day) is approximately 15 times the MRHD on a mg/m 2 basis. When almotriptan (25, 100, or 400 mg/kg/day) was administered orally to rats throughout the periods of gestation and lactation, gestation length was increased and litter size and offspring body weight were decreased at the highest dose. The decrease in pup weight persisted throughout lactation. The no-effect dose in this study (100 mg/kg/day) is 40 times the MRHD on a mg/m 2 basis.

8.3 Nursing Mothers It is not known whether almotriptan is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when almotriptan tablets are administered to a nursing woman. Levels of almotriptan in rat milk were up to 7 times higher than in rat plasma.