Lamotrigine is prescribed for certain types of epilepsy and for the maintenance treatment of bipolar I disorder. Like any medication, it can cause side effects, although most people who take it will not experience every effect listed in the prescribing information.
One question that sometimes arises is: Does lamotrigine cause hair loss?
The answer is that hair loss has been reported in people taking lamotrigine, but it does not appear to be a common side effect. Official prescribing information lists alopecia, the medical term for hair loss, as an infrequent dermatological event. Published case reports and medication-safety reports also describe possible associations between lamotrigine and increased shedding. However, the available evidence does not establish how often it happens or prove that lamotrigine caused every reported case.
Hair loss can have many explanations, including stress, illness, hormonal changes, nutritional deficiencies, inherited pattern hair loss, and other medications. For that reason, noticing more hair in the shower after starting lamotrigine does not automatically mean the medicine is responsible.
Is Hair Loss a Recognised Side Effect of Lamotrigine?
Hair loss is included in lamotrigine prescribing information, but it is not generally listed among the most commonly reported effects. The term “infrequent” indicates that it was observed less often than typical side effects reported during clinical development.
Post-marketing reports provide additional information. One pharmacovigilance analysis examined 337 international reports in which lamotrigine was suspected of contributing to alopecia. In many reports, lamotrigine was the main suspected medication, but some patients were also using other drugs that could have affected the result.
These numbers require careful interpretation. Spontaneous reporting databases collect possible adverse events rather than confirmed cases. They cannot show the true percentage of lamotrigine users who develop hair loss because the total number of people taking the medicine is not known within the database. Reports may also be incomplete, duplicated, influenced by public awareness, or complicated by other health conditions.
The evidence therefore supports a possible association, but not a precise risk estimate.
What Might Lamotrigine-Related Hair Loss Look Like?
Medication-related hair loss often appears as increased shedding across the scalp rather than a single bald patch. A person may notice more strands on a pillow, in a hairbrush, around the shower drain, or between the fingers during washing.
The ponytail may gradually feel thinner, or the scalp may become more visible under bright light. In many cases, there is no clear redness, scarring, or sharply defined area of loss.
This pattern may resemble telogen effluvium, a form of diffuse, non-scarring shedding. Telogen effluvium occurs when a larger number of hair follicles move into the resting phase of the growth cycle. The affected hairs are later released, sometimes weeks or months after the original trigger.
Lamotrigine has been linked to telogen-type shedding in individual reports, but the biological mechanism has not been established. It is also difficult to determine whether the medicine itself, the condition being treated, stress, changes in sleep, another medication, or a nutritional issue contributed to the shedding.
Patchy bald areas, broken hairs, scalp scaling, painful inflammation, or scarring are less typical of simple medication-related shedding and should be assessed by a medical professional.
When Can Hair Loss Begin?
There is no fixed timeline for suspected lamotrigine hair loss. Reports describe different intervals between starting treatment and noticing shedding. In some cases, it began within the first few months. In others, the timing was less clear.
This variation is not surprising because visible shedding may occur after a delay. A hair follicle can enter a resting stage well before the strand actually falls. As a result, the trigger may have occurred several weeks earlier.
A useful timeline should include:
The date lamotrigine was started
The dates of any dose increases
When excessive shedding first became noticeable
Any recent illness, surgery, fever, or emotional stress
Changes in weight, diet, or menstrual patterns
New medications or supplements
Pregnancy, childbirth, or stopping hormonal contraception
A clear timeline does not prove causation, but it can help a doctor assess whether the relationship is plausible.
Could a Higher Dose Increase the Risk?
Current evidence does not provide a dependable dose-response relationship for lamotrigine-related hair loss. Some medication side effects become more likely as the dose rises, but that has not been clearly demonstrated for alopecia associated with lamotrigine.
A person might notice shedding after a dose increase, but several events may have occurred around the same time. The underlying condition may have changed, another medicine may have been introduced, or the hair may be reacting to an earlier physical or emotional stressor.
Patients should not lower their dose to test whether the shedding improves. Lamotrigine dosing depends on the condition being treated, other medicines, and individual clinical factors. Changes should be planned by the prescribing clinician.
Other Causes of Hair Loss to Consider
Hair loss is common, and medication is only one possible explanation. An assessment should consider other causes before concluding that lamotrigine is responsible.
Pattern Hair Loss
Androgenetic alopecia can affect people of any gender. It usually develops gradually rather than suddenly. Men may notice changes at the temples or crown, while women often experience widening of the part and reduced density over the top of the scalp.
Telogen shedding can occur at the same time as pattern hair loss, making thinning seem more sudden.
Iron Deficiency
Low iron stores may contribute to diffuse shedding in some people. Heavy menstrual bleeding, restricted diets, gastrointestinal conditions, or recent blood loss can increase the likelihood of iron deficiency.
Iron supplements should not be started simply because hair is shedding. Excess iron can be harmful, and treatment should be based on an appropriate medical assessment.
Thyroid Conditions
Both underactive and overactive thyroid conditions can affect hair growth. Thyroid-related shedding is often diffuse and may occur with changes in weight, temperature tolerance, heart rate, energy, or bowel habits.
Illness and Physical Stress
High fever, significant infection, surgery, rapid weight loss, and severe physical stress can interrupt the hair cycle. Shedding may not appear until weeks or months after the event, so the connection is easy to overlook.
Diet and Weight Loss
A diet that provides too little protein, energy, iron, or other nutrients may affect hair growth. Crash diets and rapid weight loss can be particularly relevant.
Taking multiple “hair vitamins” without identifying a deficiency is not necessarily helpful. Some nutrients can cause side effects when taken in excessive amounts.
Hormonal Changes
Pregnancy, childbirth, menopause, stopping hormonal medication, and some endocrine conditions can alter the hair cycle.
Other Medications
People taking lamotrigine may also use antidepressants, antipsychotics, antiseizure medicines, blood-pressure medication, hormonal treatment, or other drugs. The full medication list should be reviewed rather than focusing on lamotrigine alone.
What Should You Do If You Notice Hair Loss?
Start by documenting what is happening. Take clear photographs of the front, temples, part line, crown, and back of the scalp under similar lighting. Repeat the photographs every few weeks rather than checking the mirror several times a day.
Write down when the shedding started and whether it followed a medication change. Note any recent illness, stress, dietary changes, or weight loss.
Contact the clinician who prescribes your lamotrigine. Explain how much hair you are losing, how long it has continued, and whether there are other symptoms.
The clinician may review your medication history and consider whether further evaluation is needed. Depending on your health history and the pattern of loss, this may include a scalp examination or blood tests for issues such as anaemia, iron status, or thyroid function. Testing should be guided by clinical findings rather than ordered as the same broad panel for everyone.
A dermatologist may be helpful when the diagnosis remains unclear, the shedding is persistent, or there are signs of a separate scalp disorder.
Do Not Stop Lamotrigine Suddenly
Stopping lamotrigine without medical advice can create significant risks. For people taking it for epilepsy, abrupt withdrawal may lead to worsening seizure control. For people receiving it for bipolar disorder, stopping treatment may affect mood stability.
Current prescribing information generally advises tapering lamotrigine over at least two weeks when discontinuation is clinically appropriate, rather than ending treatment suddenly. The exact plan may differ according to the patient’s diagnosis, dose, other medications, and medical circumstances.
Hair loss can be upsetting, but it is not usually a reason to make an unplanned dose change. The prescribing clinician can weigh the severity of the shedding against the benefits of treatment and the risks of switching medication.
Will Hair Grow Back?
Hair may recover when shedding is related to a temporary trigger, but regrowth is not immediate. Hair follicles work in cycles, and a reduction in shedding can occur before visible density returns.
When a medication is considered the likely cause, a clinician may discuss continued observation, dose adjustment, or an alternative treatment. Whether a change is appropriate depends on the reason lamotrigine was prescribed and how well it is controlling the condition.
Published reports describe improvement after lamotrigine was changed or discontinued, but individual case reports cannot predict what will happen for every patient. Continued pattern hair loss, nutritional deficiency, thyroid disease, or another ongoing trigger may prevent complete recovery.
Even after the trigger has been addressed, several months may pass before short regrowing hairs become noticeable. Restoring previous length can take considerably longer because scalp hair grows gradually.
Can Supplements Stop the Shedding?
Supplements are unlikely to correct hair loss unless a relevant deficiency exists. Biotin, iron, zinc, vitamin D, and other products are frequently marketed for hair, but taking high doses without a confirmed need may provide no benefit.
Biotin can also interfere with certain laboratory test results. Iron may cause digestive side effects and can be dangerous in excess. Zinc taken at high doses for an extended period may contribute to copper deficiency.
A balanced diet containing sufficient energy, protein, vegetables, fruit, and sources of iron is more appropriate than relying on several unproven products. A doctor or registered dietitian can provide individual advice when dietary restriction, weight loss, or a medical condition is involved.
Should You Use Minoxidil?
Minoxidil is used for certain forms of hair loss, particularly androgenetic alopecia. It is not automatically necessary for short-term medication-related shedding.
Some people experience an initial increase in shedding after starting minoxidil, and continued treatment is usually needed to maintain benefits in pattern hair loss. It can also cause scalp irritation or unwanted facial hair growth.
Before starting it, the cause of the hair loss should be assessed. A dermatologist can determine whether minoxidil is appropriate, especially when pattern hair loss and telogen shedding may be occurring together.
Hair Loss Is Different From a Lamotrigine Rash
Hair shedding should not be confused with a new skin rash. Lamotrigine can cause serious skin reactions, particularly during the early weeks of treatment, although reactions can also occur later.
A new rash while taking lamotrigine requires prompt medical advice. Blistering, peeling skin, sores in the mouth or around the eyes, facial swelling, fever, swollen lymph nodes, breathing difficulty, or widespread painful skin changes require urgent assessment.
The prescribing information warns that it is not always possible to distinguish an initially mild rash from one that may become serious. Patients should follow the emergency and medication instructions provided by their clinician rather than waiting to see whether the rash improves.
Frequently Asked Questions
Is hair loss common with lamotrigine?
It appears to be uncommon. Alopecia is included in prescribing information as an infrequent event, and the available research mainly consists of case reports and spontaneous safety reports rather than studies that establish a reliable percentage.
Can lamotrigine make hair thinner without causing obvious bald spots?
Possibly. Reported cases often involve diffuse shedding or reduced density rather than one clearly defined bald area. However, pattern hair loss and telogen effluvium from other causes can look similar.
Does hair loss mean lamotrigine is damaging the hair follicles permanently?
Not necessarily. Medication-related telogen shedding is generally considered non-scarring, meaning the follicles are not automatically destroyed. Persistent loss, scarring, inflammation, or patchy baldness needs a separate assessment.
Should I stop lamotrigine if my hair starts falling out?
Do not stop it on your own. Speak with the prescribing clinician. Sudden discontinuation may affect seizure control or mood stability, and any dose reduction should be medically supervised.
How can a doctor tell whether lamotrigine is the cause?
There is no single test. The assessment usually considers timing, dose changes, other medications, the pattern of hair loss, scalp findings, medical history, and possible alternative triggers. Improvement after a supervised medication change may support the connection, but it still may not provide absolute proof.
Final Thoughts
Lamotrigine can be associated with hair loss, but this effect appears to be uncommon and the true frequency is unknown. The strongest available evidence comes from official adverse-event listings, individual case reports, and pharmacovigilance data.
Hair shedding that begins after starting lamotrigine deserves attention, but timing alone does not establish the cause. Iron deficiency, thyroid conditions, illness, stress, rapid weight loss, hormonal changes, pattern hair loss, and other medications can produce a similar result.
The practical next step is to document the shedding and discuss it with the prescribing clinician. Do not reduce or stop lamotrigine without medical supervision. With an appropriate assessment, it may be possible to identify the likely trigger and decide whether observation, treatment of another condition, dermatological care, or a medication adjustment is appropriate.