No single medication is considered the definitive best treatment for trichotillomania, and no drug has FDA approval specifically for hair-pulling disorder. That said, several medications have shown real promise in clinical trials, and the strongest current evidence points to drugs that target the brain’s glutamate system, particularly N-acetylcysteine (NAC) and memantine, along with an older antidepressant called clomipramine. The right choice depends on your symptoms, your age, and how you respond to treatment.
Why There’s No Clear Winner
Trichotillomania sits at an awkward intersection of impulse control, compulsive behavior, and anxiety. That complexity is one reason no single drug class dominates treatment. A major Cochrane review, which pools data from multiple clinical trials, concluded there is currently insufficient evidence to confirm or refute the effectiveness of any specific medication for hair-pulling disorder in adults, children, or adolescents. What researchers do have is a collection of smaller trials pointing in several promising directions.
Because everything is technically off-label, treatment often involves trying one option, seeing how you respond over several weeks, and adjusting from there. Many clinicians also recommend combining medication with behavioral therapy, which consistently outperforms medication alone in head-to-head comparisons.
N-Acetylcysteine (NAC)
NAC is an over-the-counter supplement that works by modulating glutamate, a brain chemical involved in habit formation and compulsive behavior. In a randomized, double-blind trial, doses between 1,200 and 2,400 mg per day were significantly more effective than placebo and produced no reported adverse events. Case reports describe complete hair regrowth in frontal scalp areas within two to three months of starting 1,200 mg daily, with results holding through six-month follow-up periods.
NAC’s biggest advantage is its side effect profile. In adult trials, no adverse events were reported in the treatment group. Pediatric studies showed higher rates of nausea (around 30%) and occasional digestive complaints, but overall tolerability was good. The main limitation: a trial in children and adolescents found NAC performed only slightly better than placebo (25% response vs. 21%), suggesting it may work better in adults than in younger patients.
Memantine
Memantine targets the same glutamate system as NAC but through a different mechanism. A double-blind, placebo-controlled trial of 100 adults found striking results: 60.5% of participants taking memantine (10 to 20 mg per day) were rated “much or very much improved” after eight weeks, compared with just 8.3% on placebo. That translates to a number needed to treat of about 2, meaning for roughly every two people who take memantine, one will have a meaningful response. The drug was well tolerated in the trial.
Memantine requires a prescription and is primarily approved for Alzheimer’s disease, so your prescriber would be using it off-label. Still, these are some of the most robust medication results in trichotillomania research to date.
Clomipramine
Clomipramine is an older tricyclic antidepressant that affects serotonin more potently than modern SSRIs. It has a moderate effect size in trials (0.71 on a standardized scale), making it roughly twice as effective as SSRIs for hair-pulling symptoms. In one key trial, clomipramine reduced symptoms more than placebo, though the difference narrowly missed statistical significance in that particular study.
The trade-off is side effects. Common complaints include dry mouth, fatigue, constipation, dizziness, and insomnia. Some patients find these effects difficult enough to discontinue treatment. Clomipramine is typically reserved for cases where other options haven’t worked, or when significant depression or anxiety accompanies the hair pulling.
Why SSRIs Often Disappoint
Many people with trichotillomania are first prescribed an SSRI like fluoxetine or sertraline, since these drugs are so widely used for anxiety and OCD. For hair pulling specifically, the evidence is discouraging. A meta-analysis found virtually no difference between SSRIs and placebo for trichotillomania symptoms (effect size of 0.02, essentially zero). SSRIs may help if you also have depression or generalized anxiety, but they shouldn’t be expected to reduce the pulling itself.
Other Medications With Limited Evidence
Olanzapine
This atypical antipsychotic showed a 66% reduction in hair-pulling severity in a small open-label study, with four patients achieving complete remission. Anxiety scores also dropped by 63%. However, olanzapine carries risks of weight gain, metabolic changes, and sedation that make it a less appealing first choice. It’s generally considered when other treatments have failed.
Naltrexone
Naltrexone blocks opioid receptors in the brain and may reduce the pleasurable or rewarding sensation some people experience during hair pulling. A pilot study in children (average age 9) found that 11 out of 14 responded to naltrexone at an average dose of about 66 mg per day, with no liver problems or adverse effects reported. These results are encouraging but preliminary, coming from a small, open-label study without a placebo comparison.
Behavioral Therapy Still Leads
Medication rarely works as well alone as it does alongside behavioral therapy. Habit reversal training, the most studied behavioral approach, has a large treatment effect (1.14 on a standardized scale), significantly outperforming both clomipramine and placebo in direct comparisons. The therapy teaches you to recognize the urge to pull, identify triggers, and substitute a competing physical response.
In practice, many people benefit from starting behavioral therapy and adding medication if therapy alone isn’t enough, or starting both simultaneously if symptoms are severe. The glutamate-targeting options (NAC and memantine) pair especially well with therapy because they appear to reduce the compulsive drive itself, making it easier to apply behavioral strategies.
What to Expect When Starting Treatment
Most medications for trichotillomania take four to eight weeks to show noticeable effects. NAC is often tried first because it’s available without a prescription, is inexpensive, and has minimal side effects. If you’re working with a prescriber, memantine or clomipramine would typically be the next considerations based on current evidence, with olanzapine or naltrexone held in reserve.
Response rates across all medications hover between 25% and 60%, which means no single drug works for everyone. If your first option doesn’t help after a fair trial of six to eight weeks, switching to a different class rather than a different drug within the same class tends to be the more productive strategy. The glutamate modulators, serotonin-targeting drugs, and opioid antagonists each work through distinct brain pathways, so a failure with one doesn’t predict failure with another.