FDA-approved (specific uses)

Long-acting injectable medications

Long-acting injectables (LAIs) are antipsychotic and mood-stabilizing medications given as an injection every few weeks to every few months. They are mainly used for schizophrenia and bipolar disorder, where missed doses are a leading cause of relapse and hospitalization.

Common uses: Schizophrenia, schizoaffective disorder, bipolar disorder
Dosing interval: Every 2 weeks to every 6 months, depending on the medication
Key benefit: Steady medication levels without daily pills
Coverage: Generally covered, often with prior authorization

Who benefits most

LAIs help people who struggle with daily pills — because of forgetfulness, insight challenges, or simply preference. Studies show they reduce relapse and rehospitalization compared with oral medication in people with a history of missed doses. They are also a reasonable choice for anyone who prefers not to take a pill every day.

What to expect

Injections are given in a clinic, usually in the arm or hip. Some medications require a brief overlap with oral doses at the start. Side effects mirror the oral version of the same drug; the difference is delivery, not chemistry.

Common questions

If I have a side effect, am I stuck with it for months?

The medication does clear slowly, which is why prescribers usually test tolerability with the oral form first before switching to an injection.

Are LAIs only for severe illness?

They are most common in schizophrenia and bipolar care, but the choice is about reliability and preference, not punishment or severity.

This guide is educational and not medical advice. If you are in crisis, call or text 988.