Drug-induced hair loss is usually telogen effluvium — a diffuse, all-over shedding that starts 2-4 months after beginning (or changing) a medication and reverses after stopping it. Common culprits include some blood thinners, beta-blockers and other blood-pressure drugs, certain antidepressants, retinoids (high-dose vitamin A / acne medication), some anticonvulsants, thyroid medication when the dose is off, and hormonal treatments. Chemotherapy is different — it causes anagen effluvium, a faster and heavier loss that also typically regrows after treatment.
The key move is not to stop a prescribed drug on your own — the medication may matter more than the hair, and the shedding is usually temporary. Instead, note the timing (did it start a couple of months after a new drug?), tell your prescriber, and ask whether an alternative exists. Most drug-related shedding recovers within 6-12 months once the trigger is addressed.
Try the free self-check →Sources: AGA review (CCID) ↗
FAQ
Should I stop my medication because of hair loss?
Not on your own. The drug may be important and the shedding is usually temporary and reversible. Tell your prescriber the timing and ask about alternatives before changing anything.
Which common drugs cause hair loss?
Some blood thinners, blood-pressure drugs (beta-blockers), certain antidepressants, retinoids/acne medication, some anticonvulsants, and mis-dosed thyroid medication are common examples. The link is usually temporary telogen effluvium.
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⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child