Does Losartan Cause Hair Loss? Understanding the Potential Side Effect

Losartan is a widely prescribed medication used to treat high blood pressure and protect the kidneys from damage caused by diabetes. While it is generally well-tolerated, patients often ask: does losartan cause hair loss?

Hair loss can be distressing and may lead people to worry whether a new medication is to blame. In this article, we’ll explore whether there’s a link between losartan and hair loss, examine the available research, and offer tips for managing unwanted hair shedding if it occurs.

Table of Contents

• What Is Losartan?
• Does Losartan Cause Hair Loss?
• Possible Reasons for Hair Loss While Taking Losartan
  • 1. Individual Sensitivity to the Drug
  • 2. Telogen Effluvium (Stress-Related Hair Loss)
  • 3. Underlying Health Conditions
  • 4. Drug Interactions or Polypharmacy
• What Do Studies Say?
• What Should You Do If You’re Losing Hair on Losartan?
  • 1. Talk to Your Doctor
  • 2. Check for Other Causes
  • 3. Monitor the Timing
  • 4. Use Gentle Hair Care Practices
• Should You Be Worried?
• Final Thoughts

What Is Losartan?

Losartan is an angiotensin II receptor blocker (ARB), used to lower blood pressure, reduce the risk of stroke, and slow the progression of kidney disease, particularly in people with type 2 diabetes. Common brand names include Cozaar and various generics.

By relaxing blood vessels, losartan helps the heart pump more efficiently and reduces overall strain on the cardiovascular system.

Does Losartan Cause Hair Loss?

Hair loss is not listed as a common or known side effect of losartan in the official FDA prescribing information. However, some patients have reported experiencing hair thinning or increased shedding after starting the medication.

So, is losartan to blame? The answer isn’t straightforward. While there’s no strong clinical evidence linking losartan directly to hair loss, there are several possible indirect causes that may explain this symptom in some individuals.

Possible Reasons for Hair Loss While Taking Losartan

1. Individual Sensitivity to the Drug

Every person reacts differently to medications. Though rare, it’s possible that some individuals are sensitive to losartan’s effects in ways not fully understood, potentially triggering an inflammatory or immune response that leads to hair shedding.

2. Telogen Effluvium (Stress-Related Hair Loss)

Starting a new medication can sometimes act as a stress trigger for the body, causing a condition called telogen effluvium. This type of temporary hair loss occurs when hair prematurely enters the resting (telogen) phase of the growth cycle, often triggered by physical or emotional stress — including medication changes, illness, or surgery.

3. Underlying Health Conditions

High blood pressure, diabetes, or kidney disease — conditions often treated with losartan — can themselves contribute to hair thinning. In these cases, the hair loss may not be caused by the medication but by the underlying condition or its complications.

4. Drug Interactions or Polypharmacy

If losartan is being taken along with other medications (such as beta-blockers, diuretics, or statins), there’s a chance that drug interactions or side effects from other drugs could be contributing to the issue.

What Do Studies Say?

As of now, no major clinical trials have identified hair loss as a statistically significant side effect of losartan. A small number of case reports and anecdotal reviews mention hair loss, but these remain isolated and do not establish a causal link.

In contrast, some other blood pressure medications — like beta-blockers — are more commonly associated with hair thinning. Therefore, if you’re on multiple medications, it’s worth investigating whether another drug may be the cause.

What Should You Do If You’re Losing Hair on Losartan?

If you notice excessive hair shedding after starting losartan, here are the steps you should take:

1. Talk to Your Doctor

Don’t stop taking losartan without medical advice. Discuss your concerns with your healthcare provider, who may evaluate whether the drug could be contributing to the problem and suggest alternatives if necessary.

2. Check for Other Causes

Your doctor may order tests to check for:

• Thyroid dysfunction
• Iron or nutrient deficiencies
• Hormonal imbalances
• Autoimmune conditions

These are all common causes of hair loss and may be unrelated to losartan.

3. Monitor the Timing

Did the hair loss start shortly after beginning losartan? Or was it present beforehand? Tracking the timeline can help determine if the medication is the likely cause.

4. Use Gentle Hair Care Practices

Reduce breakage and shedding by:

• Using sulfate-free shampoos
• Avoiding tight hairstyles
• Limiting heat styling
• Taking a biotin supplement (if approved by your doctor)

Should You Be Worried?

In most cases, losartan is not a direct cause of hair loss. If you do experience hair shedding, it may be temporary or linked to other factors like stress, illness, or nutritional imbalances. Hair typically regrows once the root cause is identified and treated.

Losartan offers life-saving benefits for managing blood pressure and protecting kidney health — and these should be weighed carefully against any potential side effects.

Final Thoughts

So, does losartan cause hair loss? The current evidence suggests that hair loss is not a common or confirmed side effect of losartan. However, individual experiences may vary, and some people may notice shedding due to indirect factors like stress or underlying health conditions.

If you’re concerned about hair loss while on losartan, speak with your healthcare provider. With the right guidance, it’s possible to manage your blood pressure effectively while also addressing any hair health issues you might face.