Sometimes hair loss starts at a time when there's no indication of heredity. You're still young, no one in your family has gone bald early, yet suddenly you see more hair in the shower. Or it thins out slowly but surely, for no apparent reason.
In such cases, an obvious cause is often overlooked: medication.
A significant number of commonly used medications can cause or worsen hair loss. This is sometimes mentioned in the package insert but is rarely actively discussed during a consultation. And if you don't know that medication can be the cause, you quickly start looking for explanations that don't exist.
How do medications cause hair loss?
Medications cause hair loss in two ways.
The most common is through telogen effluvium. This is a phenomenon where a stress reaction, physical or due to an external substance, prematurely pushes hair follicles into the resting phase. A few months later, when those hairs fall out, the connection to the medication is already difficult to make. After all, the shedding only begins two to six months after starting or increasing the dose.
The other way is anagen effluvium. This is more common with severe treatments like chemotherapy, where actively dividing cells are damaged. The shedding is then acute and severe and occurs within weeks.
For most people affected by this, it's the former: gradual shedding due to a medication they've been taking for some time.
Which medications can cause this?
Blood thinners
Anticoagulants such as warfarin and heparin have long been known to cause hair loss. This is one of the better-documented links in medical literature. Hair loss typically begins two to three months after initiation and can be diffuse, meaning spread across the entire scalp.
Statins
Statins are widely prescribed for cholesterol. The link with hair loss is weaker than with blood thinners, but there are enough reports in adverse event databases to take it seriously. Simvastatin and atorvastatin are most frequently implicated. It's unclear if it affects everyone, but if you've started statins and notice more hair loss in the following months, it's worth discussing with your GP.
Antidepressants
SSRIs and SNRIs such as sertraline, fluoxetine, and venlafaxine can cause hair loss in some users. The exact reason is not fully understood. In most cases, the shedding is mild and temporary, but in some people, it persists longer. This is a side effect that has long been overlooked, partly because hair loss is rarely the first topic discussed with psychiatric medication.
Beta-blockers
Beta-blockers like metoprolol and atenolol are used for heart rhythm disorders, high blood pressure, and anxiety. They are listed in the package insert as a possible cause of hair loss, although it seems to occur in a smaller group of users. Hair loss is usually moderate and often stops if the medication is discontinued or adjusted.
Retinoids (isotretinoin)
Isotretinoin, better known as Roaccutane, is used for severe acne. Hair loss is a known side effect, and at higher doses, it can be significant. The hair loss stops in most cases after discontinuing the treatment. If you are taking isotretinoin and notice hair loss, it is not a sign that something has gone wrong. It is a predictable consequence of the medication.
Other medications
There are other medications occasionally associated with hair loss, including some for gout (allopurinol), certain antibiotics with long-term use, and some stomach medications. Thyroid medication in too high or too low a dose can also disrupt the hair growth cycle. Even a slightly underactive or overactive thyroid, without medication, can cause hair loss. This is something that can be checked with a simple blood test.
How do you know if medication is the cause?
This is not always easy to determine. Hair loss due to medication doesn't start immediately after commencing it, but months later. And in the meantime, all sorts of things may have changed in your life, making the connection difficult to establish.
A few helpful questions:
Have you started a new medication or had a dose increase in the last two to six months? Is the hair loss diffuse, meaning spread across the entire head instead of in a fixed spot or along your hairline? Is there no other clear explanation, such as a strong hereditary pattern, prolonged stress, or a recent illness?
If you answer yes to these questions, it's worthwhile discussing with your GP whether your medication could be playing a role.
Do not stop medication abruptly
Perhaps this is the most practical point of this article. Many people who suspect their medication is causing hair loss consider stopping it. That is not a good idea without consulting your doctor. Many medications should not be discontinued abruptly, and the consequences can be more serious than the hair loss you want to stop them for.
The conversation with your GP is the first step. Sometimes an alternative medication is available that is less associated with hair loss. Sometimes the hair loss is mild enough to accept as a side effect of a medication you need. And sometimes the hair loss stops on its own, even if you continue to use the medication, because your body gets used to it.
What can you do besides the medical consultation?
If hair loss is unrelated to medication, or if you continue to experience hair loss even after adjusting your medication, active ingredients can support hair follicles. The Hairborn Growth Serum contains, among other things, Redensyl and Procapil, ingredients aimed at activating resting follicles and extending the growth phase. This can be useful as a supplement to what you arrange medically, not as a replacement.
The point of honesty
There's little reason to downplay hair loss caused by medication. It happens, it's listed in package inserts, yet people are rarely actively informed about it. If you've been losing more hair for a while and have no clear hereditary predisposition, your medication list is one of the first things to check.
Hair loss doesn't always have a single cause. Sometimes heredity plays a role, as does medication. Sometimes it's purely medication. Sometimes it's something entirely different. But if you don't know the cause, you won't start in the right place to address it.
Frequently Asked Questions
Which medications can cause this in men themselves?
Blood thinners, statins, antidepressants, and other medications mentioned in this article are used by men themselves and can cause this effect in them. These are medications that men take for their own condition, not medication belonging to a partner.
Is hair loss due to medication always reversible after stopping?
Usually, yes. Once the medication is stopped or adjusted, the hair growth cycle gradually recovers, although this can take several months. With long-term use of some drugs, recovery can sometimes be slower or less complete, which is why it should always be discussed with a doctor instead of stopping on your own.
Can you use a serum while still taking the medication?
Yes, you can. A serum with ingredients that support the hair follicle works through a different mechanism than the medication itself and can be used alongside your current medication. It doesn't solve the underlying cause but can be supportive.
Does the risk differ between generic versions of the same medication?
No, generic versions contain the same active substance in the same dosage, so the risk of hair loss as a side effect is basically the same as the brand-name product. Differences primarily lie in excipients, not in the active substance responsible for this effect.
Can supplements influence this risk?
There is no strong evidence that common supplements reduce or increase the risk of medication-related hair loss, although an overall healthy nutritional status can support the hair follicle in a broader sense. Consult a doctor before combining supplements with prescribed medication.
Can you know in advance if you are sensitive to this side effect?
No, there is no reliable test that can predict in advance whether you will experience this specific side effect with a particular medication. This varies from person to person and usually only becomes clear during use.
Can you ask your pharmacist for a list of risky medications?
Yes, a pharmacist can indicate, based on the package insert and known adverse event databases, whether a specific medication you are using is associated with hair loss. That is an accessible first step before seeing your GP.
Does a combination of several medications worsen the effect?
Yes, combining multiple medications, each individually known as a potential cause of hair loss, can increase the cumulative risk, although this has not been studied separately for every combination. Discuss your complete medication list with your doctor if you suspect this plays a role.
Can a dermatologist distinguish medication-related hair loss from hereditary hair loss?
Yes, a dermatologist can often distinguish between medication-related hair loss and hereditary hair loss through the pattern of shedding, additional investigations, and your medical history, although both can also occur simultaneously.
Is there a difference in risk between short-term and long-term use?
Yes, with short-term use, the risk of noticeable hair loss is often smaller than with long-term, continuous use of the same medication, because the hair growth cycle needs time to react noticeably to a persistent influence.
