Sumatriptan vs. Imitrex
See how Sumatriptan and Imitrex compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Sumatriptan and Imitrex are the same medication, generic and brand-name sumatriptan, so they work identically for acute migraine relief.
Generic sumatriptan usually costs far less than brand-name Imitrex, sometimes hundreds of dollars less per month.
Imitrex's injectable form carries an added FDA approval for cluster headache that generic sumatriptan tablets do not have.
Sumatriptan vs. Imitrex Drug Summary
Sumatriptan
Sumatriptan is a serotonin (5-HT1B/1D) receptor agonist, or triptan, used to treat acute migraine attacks with or without aura in adults. It is taken as a tablet at the first sign of a migraine, though injection and nasal spray forms also exist. As the generic form of Imitrex, it works the same way but usually costs much less.
Imitrex
Imitrex is the brand-name version of sumatriptan, a selective 5-HT1B/1D receptor agonist used for acute migraine attacks and, by injection, cluster headache. It is taken as needed at the onset of an attack rather than on a daily schedule, and is also available as a tablet or nasal spray.
Sumatriptan vs. Imitrex Side Effects
Sumatriptan
Imitrex
Sumatriptan vs. Imitrex Dosage
Sumatriptan
Imitrex
| STAGE | DOSE | WHEN |
| Starting dose | 25 mg | At the start |
| Maximum dose | 100 mg | If needed |
| Dose changes | 2 increases | As tolerated |
| STAGE | DOSE | WHEN |
| Starting dose | 25, 50, or 100 mg | At the start |
| Maximum dose | Repeat dose, max 200mg/day | If needed |
| Dose changes | 1 increase | As tolerated |
Sumatriptan
| STAGE | DOSE | WHEN |
| Starting dose | 25 mg | At the start |
| Maximum dose | 100 mg | If needed |
| Dose changes | 2 increases | As tolerated |
Imitrex
| STAGE | DOSE | WHEN |
| Starting dose | 25, 50, or 100 mg | At the start |
| Maximum dose | Repeat dose, max 200mg/day | If needed |
| Dose changes | 1 increase | As tolerated |
Sumatriptan vs. Imitrex Indications
Sumatriptan
Sumatriptan is approved only for treating a migraine attack that has already started, not for preventing future attacks. It works for migraine with or without aura in adults but has not been studied for hemiplegic or basilar migraine.
Acute treatment of migraine with aura
Acute treatment of migraine without aura
Not approved to prevent migraines
Not approved for cluster headache (tablet)
Imitrex
Imitrex covers the same acute migraine use as generic sumatriptan, but its injectable form is also FDA-approved for cluster headache attacks. It is not intended for migraine prevention, and tablets are not recommended for anyone under 18.
Acute treatment of migraine with aura
Acute treatment of migraine without aura
Acute treatment of cluster headache (injection only)
Not approved to prevent migraines
Sumatriptan vs. Imitrex Pros and Cons
Sumatriptan
Generic sumatriptan provides the exact same active ingredient and effectiveness as Imitrex, usually at a much lower price. It is stocked at nearly every pharmacy and covered by most insurance plans.
Pros
Roughly $12 to $185 for 9 tablets without insurance, before coupons
Widely stocked at nearly every pharmacy
Same active ingredient and effectiveness as the brand-name drug
Cons
Not FDA-approved for cluster headache like Imitrex's injection form
Inactive ingredients can vary slightly between generic makers
No brand-name packaging consistency some patients prefer
Imitrex
Imitrex is the original brand-name sumatriptan and carries an added FDA approval for cluster headache when given by injection. It costs significantly more than the generic, which is the main tradeoff for choosing the brand.
Pros
FDA-approved for acute cluster headache treatment (injection)
Same well-studied triptan formula used since 1992
Consistent brand-name manufacturing
Cons
Roughly $650 to $850 per month without insurance, before savings programs
Often not first-line on insurance formularies once a generic exists
No clinical advantage over generic despite being the same medication
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