Imitrex vs. Zomig

See how Imitrex and Zomig compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Imitrex and Zomig are both triptans used to stop a migraine attack once it starts, not to prevent future attacks.

  • Imitrex comes as a tablet, injection, or nasal spray, while Zomig comes as a tablet, orally disintegrating tablet, or nasal spray.

  • Imitrex's injectable form is also approved for cluster headache, a use Zomig does not have.

Imitrex vs. Zomig Drug Summary

Imitrex

Imitrex (sumatriptan) is a triptan that narrows blood vessels in the brain to relieve migraine pain. It treats acute migraine attacks, with or without aura, in adults, and its injectable form is also used for cluster headache. The tablet is taken at the first sign of a migraine, with a repeat dose allowed after two hours if needed.

Zomig

Zomig (zolmitriptan) is a triptan that works the same way, narrowing brain blood vessels to ease migraine pain. It treats acute migraine attacks, with or without aura, in adults, but it is not approved for cluster headache. It comes as a tablet, an orally disintegrating tablet, or a nasal spray, taken at the first sign of a migraine.

Imitrex vs. Zomig Side Effects

Imitrex

Most common
Flushing (up to 3%)
Chest pressure (up to 2%)
Vertigo (up to 2%)
Drowsiness (up to 2%)

Zomig

Most common
Asthenia (up to 14%)
Nausea (up to 12%)
Paresthesia (up to 11%)
Dizziness (up to 11%)

Imitrex vs. Zomig Dosage

Imitrex

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 25 mg, 50 mg, or 100 mg At the start
Maximum dose Repeat dose, max 200mg/day If needed
Dose changes 1 increase As tolerated

Zomig

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 1.25 mg or 2.5 mg At the start
Maximum dose 5 mg If needed
Dose changes 2 increases As tolerated

Imitrex vs. Zomig Indications

Imitrex

Imitrex is FDA-approved for the acute treatment of migraine attacks in adults, with or without aura. The injectable form is also approved for cluster headache, a severe pain condition distinct from migraine. It is not intended for daily prevention of migraines.

  • Acute migraine attacks with or without aura

  • Cluster headache (injection form only)

  • Available as tablet, injection, or nasal spray

  • Not approved for migraine prevention

Zomig

Zomig is FDA-approved for the acute treatment of migraine attacks in adults, with or without aura. It is not approved for cluster headache or for preventing migraines before they start. It comes in three forms, giving patients options based on how quickly they need relief.

  • Acute migraine attacks with or without aura

  • Available as tablet, ODT, or nasal spray

  • Not approved for cluster headache

  • Not approved for migraine prevention

Imitrex vs. Zomig Pros and Cons

Imitrex

Imitrex has the longest history of use among triptans and is available as a tablet, injection, or nasal spray, giving flexibility based on how fast relief is needed. The injectable form is also approved for cluster headache, a use unique to this drug. As a long-established generic, it tends to be consistently stocked by pharmacies.

Pros

  • Longest-established triptan, in use since 1992

  • Only triptan form approved for cluster headache (injection)

  • Available as tablet, injection, or nasal spray

  • Generic widely available and consistently stocked

Cons

  • Higher rate of chest pressure sensations reported

  • No orally disintegrating tablet option

  • Tablets not recommended for anyone under 18

  • Repeat dosing requires waiting at least 2 hours

Zomig

Zomig has a shorter half-life than many triptans, so it clears the body more quickly. It is available as a tablet, an orally disintegrating tablet, or a nasal spray, which lets patients choose an option that does not require water. It is not approved for cluster headache or for daily migraine prevention.

Pros

  • Orally disintegrating tablet dissolves without water

  • Nasal spray option for faster absorption

  • Shorter half-life may mean quicker clearance from the body

  • Available in a wider range of doses (1.25 mg to 5 mg)

Cons

  • Higher reported rates of asthenia, nausea, and dizziness

  • Not approved for cluster headache

  • Tablet and ODT forms not approved under age 12

  • Requires dose adjustment when taken with cimetidine

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