Imitrex vs. Aimovig
See how Imitrex and Aimovig compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Imitrex is a fast-acting triptan taken at the first sign of a migraine, while Aimovig is a monthly injection designed to prevent migraines before they begin.
Imitrex comes in tablet, injection, and nasal spray forms for quick symptom relief but is not meant for daily prevention.
Aimovig blocks the CGRP receptor thought to drive migraine attacks and is given once a month, with fewer cardiovascular restrictions than triptans like Imitrex.
Imitrex vs. Aimovig Drug Summary
Imitrex
Imitrex (sumatriptan) is a triptan that stops a migraine attack already underway by narrowing blood vessels and blocking pain signals in the brain. It is taken as a tablet, injection, or nasal spray at the first sign of migraine, with a repeat dose allowed two hours later if needed.
Aimovig
Aimovig (erenumab-aooe) is a monthly injectable antibody that blocks the CGRP receptor believed to drive migraine attacks, helping prevent them before they start. It is given as a single subcutaneous injection once a month and is not used to treat an attack that has already begun.
Imitrex vs. Aimovig Side Effects
Imitrex
Aimovig
Imitrex vs. Aimovig Dosage
Imitrex
Aimovig
| 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 |
| STAGE | DOSE | WHEN |
| Starting dose | 70 mg once monthly | At the start |
| Maximum dose | 140 mg once monthly | If needed |
| Dose changes | 1 increase | As tolerated |
Imitrex
| 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 |
Aimovig
| STAGE | DOSE | WHEN |
| Starting dose | 70 mg once monthly | At the start |
| Maximum dose | 140 mg once monthly | If needed |
| Dose changes | 1 increase | As tolerated |
Imitrex vs. Aimovig Indications
Imitrex
Imitrex is FDA-approved for acute treatment of migraine attacks with or without aura in adults, and the injection form is also approved for cluster headache. It is meant to treat symptoms once they start, not to prevent future attacks.
Acute migraine with or without aura in adults
Acute cluster headache treatment (injection only)
Not approved for migraine prevention
Not approved for pediatric oral use
Aimovig
Aimovig is FDA-approved for the preventive treatment of migraine in adults, aiming to reduce how often attacks occur over time. It is not intended to treat a migraine attack that has already started, and it is approved only for adult use.
Preventive treatment of migraine in adults
Reduces monthly migraine frequency over time
Not approved to treat an active migraine attack
Approved for adult use only
Imitrex vs. Aimovig Pros and Cons
Imitrex
Imitrex offers rapid relief once a migraine attack begins, with decades of clinical use and multiple delivery options. It is not designed for prevention and carries cardiovascular restrictions that limit its use in some patients.
Pros
Multiple forms (tablet, injection, nasal spray) for fast relief
Decades of clinical use and established safety data
Can be paired with a separate preventive therapy
Available as a lower-cost generic tablet
Cons
Not effective for migraine prevention
Contraindicated in cardiovascular and vascular disease
Risk of medication overuse headache with frequent use
Cannot be combined with other triptans or ergots within 24 hours
Aimovig
Aimovig is designed to reduce migraine frequency with just one injection a month, and it avoids the cardiovascular contraindications common to triptans. It does not relieve a migraine already in progress and has less long-term data than older options.
Pros
Only one injection needed per month
Prevents migraines before they start, rather than treating them
No cardiovascular contraindications like triptans
Can be used alongside a separate acute treatment
Cons
No generic version currently available
Does not relieve an active migraine attack
Fewer years of long-term safety data (approved 2018)
Constipation risk, including rare serious complications
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