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MigraineSeptember 2023Summary reviewed August 2026

A Daily Pill Cut Migraine Days by 7 in People with Chronic Migraines

People who get migraines on most days of the month took a pill called atogepant and had about seven fewer migraine days each month — two more days of relief than people who got a placebo. The most common side effects were constipation and nausea.

What the trial was testing

The PROGRESS enrolled 778 patients with migraine. The study was sponsored by Allergan and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was a large trial designed to confirm whether the treatment works well enough for wider use. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

People on the pill had 7 fewer migraine days per month compared to their baseline.

Lancet (London, England) · 2023 · NCT03855137

These findings — that people taking the pill had 7 fewer migraine days compared to when they started — were published in the Lancet (London, England) and represent the headline result of the study.

Researchers tracked outcomes across 778 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with migraine, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This pill is now FDA-approved for chronic migraine prevention. If you have migraines on 15 or more days a month, ask your doctor if this treatment could help. The pill worked well in this large study, though some people had constipation or nausea.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.