Hair loss is a recognized side effect of Lexapro (escitalopram), though it’s uncommon. It does not appear in the clinical trial data for the drug but is listed in the FDA prescribing information under post-marketing reports, meaning it was reported by patients after the medication reached the market. For most people who experience it, the shedding is reversible once the medication is stopped or adjusted.
How Lexapro Can Trigger Hair Shedding
The type of hair loss linked to Lexapro and other SSRIs is called telogen effluvium. Normally, about 85 to 90 percent of your hair follicles are in their active growth phase at any given time, while the rest are in a resting phase before naturally falling out. With telogen effluvium, the medication pushes a larger-than-normal percentage of follicles out of the growth phase and into the resting phase prematurely. When those resting hairs reach the end of their cycle, they shed all at once, creating noticeable thinning.
The exact molecular pathway behind this isn’t fully understood, but one theory involves serotonin’s role in skin biology. Human skin produces serotonin and converts it into melatonin, both of which are involved in regulating the hair growth cycle. Because Lexapro directly alters serotonin levels in the body, it may disrupt the balance between hair growth and hair shedding at the follicle level. Direct toxic effects of the drug on the hair follicle matrix are also considered a possibility.
When Hair Loss Typically Starts
Published case reports show a wide window. In one case, a patient noticed significant shedding just five weeks after starting Lexapro, about a week after her dose was increased to 10 mg. In another, hair loss didn’t begin until the third month of treatment. This range is consistent with the general timeline for telogen effluvium from any cause: because follicles need to complete the full resting phase before they fall out, shedding typically appears one to six months after the triggering event.
What you’ll notice is more hair in your brush, on your pillow, or in the shower drain rather than distinct bald patches. The thinning is usually diffuse, spread across the scalp, which distinguishes it from other types of hair loss like alopecia areata (which causes round, patchy spots).
How to Tell if Lexapro Is the Cause
Pinning hair loss on a specific medication can be tricky because so many other factors cause the same kind of shedding. Stress, thyroid problems, iron deficiency, hormonal changes, and even the depression or anxiety that led to starting Lexapro in the first place can all trigger telogen effluvium. The timing matters most: if your shedding started within a few months of beginning or increasing your dose, the medication is a plausible culprit.
Your doctor may run blood tests to rule out other causes, including thyroid function, iron levels, and a complete blood count. A simple “pull test,” where the doctor gently tugs on a small group of hairs, can help confirm telogen effluvium. Normally, fewer than four to six hairs come out; a higher number suggests the diagnosis. In ambiguous cases, a small scalp biopsy can confirm it definitively. If more than 25 percent of follicles are in the resting phase on biopsy, telogen effluvium is confirmed, though this step is rarely necessary when the history points clearly to the medication.
What Happens After Stopping or Switching
Hair loss from Lexapro is generally reversible. In one published case, a patient who stopped escitalopram saw dramatic improvement within a single week. Another patient who switched to a different antidepressant experienced symptom improvement after five weeks and full regrowth by four months. A third case saw resolution by the fourth month after switching medications. These timelines vary, but they consistently show that once the trigger is removed, the hair cycle resets.
Regrowth typically begins within a few months as follicles re-enter the active growth phase. Because hair grows roughly half an inch per month, it can take six months to a year before the volume feels fully restored. In rare cases where the follicles were significantly affected or the shedding was prolonged, some persistent thinning is possible.
Your Options if You’re Experiencing Shedding
The most important thing to weigh is whether Lexapro is working well for your mental health. If it is, the decision isn’t automatic. A dose reduction may reduce shedding without requiring a full medication change. In some cases, the hair loss stabilizes or even improves on its own as the body adjusts to the medication over time.
If the hair loss is intolerable, switching to a different antidepressant is the most common approach. Case reports describe successful transitions to both sertraline and duloxetine, though it’s worth noting that other SSRIs can also cause telogen effluvium. There’s no single antidepressant guaranteed to be hair-loss-free, so the switch is partly trial and error.
Supporting hair health during this period with adequate protein, iron, and overall nutrition can help, since nutritional deficiencies compound the problem. Avoiding harsh hair treatments and excessive heat styling reduces mechanical stress on already-vulnerable follicles. None of these measures will override the drug’s effect on the hair cycle, but they remove additional contributors to shedding while you and your provider figure out the best path forward.