Does Lamotrigine Cause Hair Loss?

How Strong Is the Evidence Linking Lamotrigine to Hair Loss?

Yes, lamotrigine can cause hair loss, although most patients do not experience this reaction. The current FDA label lists alopecia among infrequent dermatological adverse reactions. This listing confirms a safety signal, not certain causation for every case.

Clinical trials recorded events during treatment, but only some trials included placebo controls. Therefore, the label cannot provide a precise individual probability. New shedding becomes more suspicious after starting lamotrigine or changing dosage. A clinician compares timing with illness, stress, nutrition, hormones, and medicines.

How Common Is Hair Loss With Lamotrigine?

The FDA places observed lamotrigine alopecia within a frequency band of approximately 0.1% to 1%. The label derived this category from 6,694 people who received Lamictal during clinical trials. Investigators recorded adverse events using varied terms, then grouped similar events into standardized categories. Only some trials used placebo controls, limiting direct comparisons with untreated participants. Consequently, this band describes observation frequency rather than proven drug-attributable incidence. It also cannot predict personal risk because diagnosis, dosage, medicines, and individual susceptibility differ.

What Evidence Connects Lamotrigine With Alopecia?

A global pharmacovigilance analysis found 337 suspected lamotrigine-related alopecia cases from 19 countries. Lamotrigine was the only suspected medicine in 291 reports. It was the only recorded medicine in 112 reports. Hair loss improved after discontinuation in 11 patients.

One patient experienced renewed alopecia after restarting lamotrigine. That recurrence provides stronger causal evidence than timing alone. However, spontaneous reports lack a known denominator and often contain incomplete histories. They support an association but cannot calculate incidence or prove every reported case.

What Type of Hair Loss Can Lamotrigine Cause?

Lamotrigine-associated hair loss most often resembles diffuse, non-scarring telogen effluvium.

One published case used hair-root examination rather than symptoms alone. The examination found more resting and dystrophic hairs, with fewer actively growing hairs. This finding supports disruption of the normal hair cycle. It does not prove one mechanism for every patient. Diffuse shedding differs from smooth patches, inflamed areas, broken hairs, or visible scarring. Those patterns may indicate another disorder. A dermatologist identifies the pattern through scalp examination and targeted testing.

When Does Lamotrigine Hair Loss Usually Begin?

Lamotrigine-related hair loss may begin within weeks, but delayed onset also occurs.

A case described increased shedding two to three weeks after treatment began. Lareb reports ranged from immediate onset to 6.5 years. Their median reported latency was three months. Long delays weaken simple causal assumptions because other triggers become increasingly plausible. A later dose increase preceded shedding in another published case. Record medication starts, dosage changes, illnesses, weight loss, childbirth, and major stress. This timeline helps clinicians compare explanations.

Is Lamotrigine Hair Loss Dose-Dependent?

Researchers have not established a reliable dose-response relationship for lamotrigine-related hair loss.

One case developed shedding months after a lamotrigine increase. However, that patient also changed valproate formulations, creating an important confounder. Valproate independently causes alopecia and alters lamotrigine clearance. Therefore, worsening after escalation does not automatically prove dose dependence. Your clinician should review every medicine, supplement, and recent dosage adjustment. They may consider supervised changes when hair loss becomes persistent or distressing. Current evidence does not support self-directed dose reduction.

How Can You Tell Whether Lamotrigine Causes Your Hair Loss?

No single test confirms lamotrigine caused your hair loss.

Clinicians combine several findings:

• Timing matters because shedding should follow treatment initiation, escalation, or another medication change.
• Pattern matters because drug-related shedding usually appears diffuse and non-scarring.
• Testing may identify thyroid disease, iron deficiency, nutritional problems, or other medical triggers.
• Photographs under consistent lighting document progression and later regrowth.
• Improvement after supervised adjustment strengthens suspicion, although recovery may take time.
• Dermatology review helps when scalp findings remain unusual or diagnosis stays uncertain.

Does Hair Grow Back After Lamotrigine Hair Loss?

Hair often regrows after the trigger resolves, but lamotrigine-specific recovery estimates remain uncertain.

Global safety reports recorded improvement after discontinuation in 11 patients. One case reported rapid shedding reduction after lamotrigine stopped. These observations support reversibility but cannot establish an average recovery timeline. Hair follicles cycle slowly, so density may improve after shedding settles. Persistent thinning may reflect another trigger or pattern hair loss. Clinicians should reassess the diagnosis when recovery stalls. Evidence cannot guarantee complete regrowth for every patient.

Should You Stop Lamotrigine Because of Hair Loss?

Do not stop lamotrigine suddenly because abrupt withdrawal can create serious risks.

Discuss distressing shedding with your prescriber:

• FDA recommends tapering over at least two weeks when discontinuation becomes appropriate.
• Your prescriber may review alternatives, dosage history, benefits, and competing causes.
• Seek care when hair loss accompanies rash, blistering, peeling, hives, or painful mouth sores.
• Those symptoms may indicate a serious skin reaction.
• Never restart after a serious rash without specialist guidance.
• Hair loss usually allows time for careful evaluation.

References

1. FDA, Lamictal Prescribing Information:
   https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/020241s068s069%2C020764s061s062%2C022251s032s033lbl.pdf
2. Tengstrand M, et al., Alopecia in Association With Lamotrigine Use:
   https://pubmed.ncbi.nlm.nih.gov/20635823/
3. Netherlands Pharmacovigilance Centre Lareb, Lamotrigine and Alopecia — An Update:
   https://databankws.lareb.nl/Downloads/KWB_2015_2_lamotrig.pdf
4. Rissardo JP, et al., Antiseizure Medication-Induced Alopecia: A Literature Review:
   https://pubmed.ncbi.nlm.nih.gov/37367730/
5. Hillemacher T, et al., Hair Loss as a Side Effect of Lamotrigine Treatment:
   https://pubmed.ncbi.nlm.nih.gov/16877669/
6. Turkoglu IND, et al., A Comprehensive Investigation of Biochemical Status in Telogen Effluvium:
   https://pubmed.ncbi.nlm.nih.gov/39107936/