Does aimovig cause constipation as a side effect?

Can Aimovig cause constipation?

Aimovig blocks the CGRP pathway, which also influences gut motility. Clinical trials reported constipation in 3% of patients on the 70 mg dose and 1% on the 140 mg dose, compared with less than 1% on placebo.

How common is constipation with Aimovig compared with other CGRP drugs?

Post-marketing data and real-world reports show higher rates than the trials suggested. Constipation occurs more frequently with Aimovig than with Emgality or Ajovy, though exact percentages vary by study and patient population.

What should patients do if constipation starts after beginning Aimovig?

Most cases are mild and improve with increased fluids, dietary fiber, or over-the-counter laxatives. If symptoms persist or become severe, patients should contact their prescriber; dose reduction or switching to a different CGRP antibody is sometimes considered.

Why does Aimovig cause constipation while other migraine treatments do not?

CGRP receptors are present throughout the gastrointestinal tract. Blocking them can slow intestinal transit. Other preventive migraine drugs, such as beta-blockers or anticonvulsants, act through different mechanisms and rarely affect bowel habits in the same way.

When do symptoms usually appear and how long do they last?

Constipation often begins within the first few weeks of treatment. For many patients it lessens after continued use or after dose adjustment, but it can persist for the duration of therapy in a smaller group.

Are there ways to reduce the risk before starting Aimovig?

Doctors may recommend starting a high-fiber diet, adequate hydration, and a mild stool softener at the same time treatment begins. Patients with a history of chronic constipation are sometimes advised to try an alternative preventive first.

What happens if constipation becomes severe or leads to complications?

Rarely, severe constipation can result in bowel obstruction. In such cases Aimovig is usually stopped and urgent medical care is required. Most patients who discontinue because of this side effect see resolution within days to weeks.

Which patients are at higher risk for this side effect?

Older adults, those taking other constipating medications (opioids, anticholinergics), and people with pre-existing gastrointestinal disorders appear more likely to experience the problem.