sumatriptan, Imitrex, Alsuma (cont.)

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PREPARATIONS: Tablets: 25, 50, 100 mg. Intranasal Solution: 5, 20 mg. Injection Solution: 4 and 6 mg/0.5 ml

STORAGE: Sumatriptan should be stored between 2-30 C (36-86 F).

PRESCRIBED FOR: All formulations of sumatriptan are used for acute treatment of migraine headaches with or without an aura in adults. The injectable formulation also is used for treating cluster headaches.

DOSING: The recommended oral dose is 25-100 mg and the maximum dose is 200 mg daily. The recommended intranasal dose is 5-20 mg and the maximum dose is 40 mg daily. The recommended injection dose is 4 or 6 mg injected under the skin. The maximum dose is two 6 mg injections separated by 1 hour.

DRUG INTERACTIONS: Monoamine oxidase inhibitors, for example, isocarboxazid (Marplan), phenelzine (Nardil), tranylcypromine (Parnate), and procarbazine (Matulane), may reduce the breakdown of sumatriptan in the liver, leading to increased blood levels and side effects of sumatriptan.

Combining sumatriptan with sibutramine (Meridia), selective serotonin reuptake inhibitors or SSRIs, including fluoxetine (Prozac), citalopram (Celexa), paroxetine (Paxil), and sertraline (Zoloft) or serotonin and norepinephrine reuptake inhibitors, including venlafaxine (Effexor), duloxetine (Cymbalta), and desvenlafaxine (Pristiq) may increase the concentration of serotonin in the brain, causing increased serotonin-related side effects.

Administering sumatriptan within 24 hours of treatment with an ergot-containing medication (dihydroergotamine [Migranal], ergotamine [Methergine]) is contraindicated because such combinations increase the likelihood of vasospasms.

PREGNANCY: Safe use in pregnancy has not been established.

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