Can metoprolol cause hair loss? This is a question many patients ask after noticing increased shedding or thinning whilst taking this widely prescribed beta-blocker. Metoprolol is used across the UK to manage hypertension, angina, heart failure, and arrhythmias. According to its Summary of Product Characteristics, alopecia is listed as a rare side effect, affecting fewer than 1 in 1,000 people. Hair loss has multiple potential causes, so a proper clinical assessment is essential before attributing it to any single medication — and you should never stop metoprolol abruptly without medical guidance.
Summary: Metoprolol can cause hair loss, but it is classified as a rare side effect affecting fewer than 1 in 1,000 patients, typically presenting as diffuse telogen effluvium two to three months after starting the drug.
- Alopecia is listed as a rare adverse effect in the metoprolol Summary of Product Characteristics, affecting fewer than 1 in 1,000 patients.
- The likely mechanism is telogen effluvium — medication-induced disruption of the hair follicle cycle — rather than permanent follicle damage.
- Hair shedding typically begins two to three months after starting metoprolol, reflecting the natural lag between follicle disruption and visible loss.
- Never stop metoprolol abruptly; sudden withdrawal can cause rebound hypertension, worsening angina, or dangerous arrhythmias.
- A GP should investigate other common causes — including thyroid dysfunction, iron deficiency, and anaemia — before attributing hair loss to metoprolol.
- If metoprolol is confirmed as the likely cause, a clinician may consider dose adjustment, switching to an alternative agent, or supportive measures such as topical minoxidil.
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Can Metoprolol Cause Hair Loss?
Yes — alopecia is listed as a rare side effect of metoprolol in its SmPC, affecting fewer than 1 in 1,000 patients. Always consult your GP before stopping the medication, as abrupt withdrawal carries serious cardiovascular risks.
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Metoprolol is a cardioselective beta-1 adrenergic receptor blocker used in the UK for conditions including hypertension, angina, heart failure, and certain arrhythmias. It works by selectively blocking beta-1 receptors in the heart, reducing heart rate and blood pressure. Like all medicines, metoprolol carries a profile of potential side effects, and hair loss — medically termed alopecia — is one that patients occasionally report.
According to the Summary of Product Characteristics (SmPC) for metoprolol (available at medicines.org.uk/emc), alopecia is listed as a rare side effect, estimated to affect fewer than 1 in 1,000 people taking the medication. Alopecia is also recognised as an adverse reaction associated with the beta-blocker drug class more broadly. The British National Formulary (BNF) metoprolol monograph similarly notes the potential for hair loss as an uncommon adverse effect.
It is important to note that hair loss has many potential causes — including thyroid disorders, nutritional deficiencies, stress, hormonal changes, and other medications — and attributing it solely to metoprolol without proper clinical assessment can be misleading. If you have noticed increased hair shedding or thinning since starting metoprolol, it is important to discuss this with your GP rather than stopping the medication abruptly. As noted in the BNF, abrupt withdrawal of a beta-blocker can cause rebound hypertension, worsening angina, or dangerous cardiac arrhythmias, and any change must be managed under medical supervision. The NHS hair loss (alopecia) page also provides useful patient-facing information on common causes and when to seek advice.
| Side Effect / Feature | Detail | Severity / Frequency | Management / Advice |
|---|---|---|---|
| Alopecia (hair loss) | Listed in metoprolol SmPC; recognised beta-blocker class effect; diffuse shedding pattern typical | Rare — fewer than 1 in 1,000 patients | Discuss with GP; do not stop metoprolol abruptly |
| Onset of shedding | Telogen effluvium typically begins 2–3 months after starting the drug | Gradual and diffuse; not sudden or patchy | Monitor; may stabilise or partially reverse over time |
| Proposed mechanism | Possible disruption of beta-adrenergic follicle cycling; reduced peripheral circulation; hormonal interactions | Incompletely understood; evidence limited | Cardioselective profile may reduce — but not eliminate — peripheral effects |
| Recommended investigations | Thyroid function (TSH, free T4), full blood count, serum ferritin and iron studies | Guided by clinical history and examination | Exclude treatable causes (anaemia, iron deficiency, thyroid disease) before attributing to metoprolol |
| Red-flag features | Rapidly progressive or patchy loss, painful/scaling scalp, scarring alopecia, systemic symptoms | Requires prompt GP review | GP referral to NHS Dermatology if indicated; trichologists are not regulated medical practitioners |
| Alternative antihypertensives | ACE inhibitors, ARBs, calcium channel blockers, thiazide-like diuretics (NICE NG136) | Generally less commonly linked with alopecia | Switch only under GP/cardiologist supervision; HFrEF patients require specialist input (NICE NG106) |
| Supportive measures | Correct nutritional deficiencies; gentle hair care; topical minoxidil (OTC, limited evidence for drug-induced telogen effluvium) | Biotin supplementation not recommended without confirmed deficiency (MHRA warning on lab interference) | Report suspected side effects to MHRA via Yellow Card scheme |
How Beta-Blockers May Affect Hair Growth
Beta-blockers may trigger telogen effluvium by disrupting beta-adrenergic signalling involved in follicle cycling, though the precise mechanisms remain incompletely understood and robust clinical evidence is limited.
To understand why metoprolol might contribute to hair loss, it helps to consider the biology of hair growth. Hair follicles cycle through phases: anagen (active growth), catagen (transition), and telogen (resting and shedding). Disruptions to this cycle — whether from physiological stress, hormonal shifts, or certain medications — can push follicles prematurely into the telogen phase, resulting in a condition known as telogen effluvium. This typically presents as diffuse shedding across the scalp rather than patchy loss. The British Association of Dermatologists (BAD) and the Primary Care Dermatology Society (PCDS) both provide patient and clinician resources on telogen effluvium, including medication as a recognised trigger.
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Several mechanisms have been proposed — as hypotheses rather than established facts — to explain why beta-blockers might contribute to telogen effluvium:
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Altered follicle cycling: Beta-adrenergic signalling is thought to play a role in regulating hair follicle activity; blocking these receptors may theoretically disrupt normal follicle cycling.
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Reduced peripheral circulation: By lowering cardiac output, beta-blockers may reduce blood flow to peripheral tissues, potentially affecting nutrient delivery to scalp follicles — though this remains speculative.
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Hormonal interactions: Some beta-blockers may influence the hormonal environment in ways that could affect follicle sensitivity, though the evidence for this in relation to metoprolol specifically is limited.
It should be emphasised that these mechanisms are incompletely understood, and robust clinical evidence directly linking metoprolol to significant hair loss is limited. The drug's cardioselective profile means it primarily targets cardiac beta-1 receptors, which may reduce — though not eliminate — the likelihood of peripheral effects compared with non-selective beta-blockers. However, direct comparative evidence on rates of alopecia between selective and non-selective agents is limited, and individual responses vary considerably.
How Common Is Hair Loss With Metoprolol?
Hair loss is classified as rare with metoprolol, affecting fewer than 1 in 1,000 patients, with shedding typically beginning two to three months after starting treatment and often stabilising over time.
Establishing the true prevalence of metoprolol-associated hair loss is challenging, largely because alopecia is a multifactorial condition and spontaneous reporting systems — such as the MHRA's Yellow Card scheme — are known to capture only a fraction of actual adverse events, meaning true rates may differ from those in product information.
Based on the metoprolol SmPC classification, hair loss is considered a rare side effect, affecting fewer than 1 in 1,000 patients. Some data suggest that non-selective beta-blockers such as propranolol may have a more frequently documented association with hair loss than cardioselective agents, though this may partly reflect differences in prescribing volumes and reporting patterns rather than a true pharmacological difference. This comparative claim should therefore be interpreted cautiously in the absence of robust head-to-head evidence.
Telogen effluvium linked to medications typically begins two to three months after starting the causative drug, reflecting the natural lag between follicle disruption and visible shedding — a time course described in PCDS and BAD guidance on telogen effluvium. Hair loss is usually gradual and diffuse rather than sudden or patchy. Importantly, for many patients, shedding stabilises or partially reverses over time, either as the body adjusts to the medication or following a change in treatment. Persistent or worsening hair loss warrants further investigation to exclude other contributing causes.
What to Do If You Notice Hair Thinning
Speak to your GP before making any medication changes; they will investigate common causes such as thyroid dysfunction, anaemia, and iron deficiency, and manage any treatment adjustment safely.
If you notice increased hair shedding or thinning whilst taking metoprolol, the first and most important step is to speak with your GP before making any changes to your medication. Stopping a beta-blocker suddenly carries significant cardiovascular risks, including rebound hypertension, angina, and arrhythmias, and must be managed under medical supervision (BNF; metoprolol SmPC).
Your GP will take a thorough history and examination to identify likely causes. In line with UK primary care practice (PCDS guidance on telogen effluvium), core investigations typically include:
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Thyroid function tests (TSH, free T4) — both hypothyroidism and hyperthyroidism are associated with hair thinning
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Full blood count (FBC) — to assess for anaemia
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Serum ferritin and iron studies — iron deficiency is a common and treatable cause of diffuse hair loss
Additional tests — such as vitamin D, vitamin B12, or a hormonal profile (for example, to assess for polycystic ovary syndrome or perimenopausal changes) — should be guided by your clinical history and examination findings rather than requested routinely.
You should seek prompt GP review if you experience any of the following red-flag features: rapidly progressive or patchy hair loss; a painful, inflamed, or scaling scalp; signs of scarring alopecia; symptoms suggesting systemic illness such as unexplained weight change, heat or cold intolerance, or fatigue; or, in children, features consistent with tinea capitis (scalp ringworm). These may indicate conditions requiring specialist assessment.
If investigations are unremarkable and metoprolol remains the suspected cause, your GP may consider whether a dose adjustment or switch to an alternative medication is clinically appropriate. Where hair loss is severe, progressive, or accompanied by significant scalp changes, your GP can refer you to NHS Dermatology for specialist assessment. It is worth noting that whilst some private 'trichology' services exist, trichologists are not regulated medical practitioners; NHS Dermatology referral via your GP is the recommended route for medically significant hair loss.
Alternative Medications and Managing Side Effects
If metoprolol is the likely cause, your GP or cardiologist may switch to an alternative antihypertensive; in heart failure, any change requires specialist input given the proven mortality benefit of beta-blockers.
If metoprolol is identified as a likely contributor to hair loss and your clinical condition permits a change, your GP or cardiologist may consider switching to an alternative agent. The choice will depend on the underlying indication and your overall cardiovascular risk profile.
For hypertension, NICE guideline NG136 (Hypertension in adults) recommends a stepped approach that includes ACE inhibitors, angiotensin receptor blockers (ARBs), calcium channel blockers, and thiazide-like diuretics as first-line options. These drug classes are generally less commonly linked with alopecia than beta-blockers; however, rare cases of drug-induced hair loss have been reported with many antihypertensive classes. Individual SmPCs should be reviewed, and the choice of alternative should be made on clinical grounds in discussion with your prescriber.
For heart failure with reduced ejection fraction (HFrEF), NICE guideline NG106 (Chronic heart failure in adults) identifies specific beta-blockers with proven mortality benefit — namely bisoprolol, carvedilol, and modified-release metoprolol succinate (and nebivolol in older adults). Switching away from a beta-blocker in this setting requires careful specialist input, as these agents carry well-established survival benefits that must be weighed against the impact of side effects.
If continuing metoprolol is necessary, the following supportive measures may be considered:
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Optimising nutritional status — ensuring adequate dietary intake of iron and protein; deficiencies should be corrected if identified on testing
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Gentle hair care practices — avoiding excessive heat styling, tight hairstyles, or harsh chemical treatments
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Topical minoxidil — available over the counter in the UK, this may help stimulate hair regrowth in some cases of telogen effluvium, though evidence specifically for medication-induced telogen effluvium is limited. Use can be associated with an initial increase in shedding and, occasionally, scalp irritation or contact dermatitis. It should be discussed with a healthcare professional before starting, and realistic expectations set regarding the time to effect (typically several months)
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Biotin (vitamin B7) supplementation — there is no good evidence to support routine biotin supplementation for hair loss unless a deficiency has been confirmed. Importantly, the MHRA has issued a Drug Safety Update warning that high-dose biotin can interfere with a wide range of immunoassay-based laboratory tests, potentially causing misleading results; it should not be taken without clinical advice
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Monitoring and reassurance — in many cases, hair loss stabilises without intervention
Any decision to alter cardiovascular medication should be made collaboratively between patient and clinician, carefully weighing the benefits of treatment against the impact of side effects on quality of life.
If you believe metoprolol or any other medicine has caused a side effect, you are encouraged to report it to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. Reports from patients and healthcare professionals help build the evidence base for understanding medication-related adverse effects, including drug-induced hair loss.
Frequently Asked Questions
How long after starting metoprolol does hair loss usually begin?
Hair loss linked to metoprolol typically begins two to three months after starting the medication, reflecting the natural delay between follicle disruption and visible shedding. This pattern is characteristic of telogen effluvium, where follicles are prematurely pushed into the resting phase before shedding occurs.
Will my hair grow back if metoprolol is causing the hair loss?
For many patients, shedding stabilises or partially reverses over time, either as the body adjusts to the medication or after switching to an alternative under medical supervision. Telogen effluvium caused by medication is generally not permanent, though recovery can take several months and other contributing causes should be excluded first.
Is hair loss more likely with metoprolol than with other beta-blockers?
Non-selective beta-blockers such as propranolol have a more frequently documented association with hair loss than cardioselective agents like metoprolol, though this may partly reflect differences in prescribing volumes and reporting patterns rather than a true pharmacological difference. Direct head-to-head evidence comparing rates of alopecia between beta-blockers is limited, so this comparison should be interpreted cautiously.
Can I just stop taking metoprolol if I think it is causing my hair to fall out?
No — you should never stop metoprolol suddenly without medical advice, as abrupt withdrawal can cause rebound hypertension, worsening angina, or dangerous cardiac arrhythmias. Speak to your GP first; they can investigate the cause of your hair loss and, if appropriate, taper or switch your medication safely.
Does topical minoxidil help with hair loss caused by metoprolol?
Topical minoxidil, available over the counter in the UK, may help stimulate regrowth in some cases of telogen effluvium, though evidence specifically for medication-induced hair loss is limited. It can cause an initial increase in shedding and occasionally scalp irritation, so it is worth discussing with a healthcare professional before starting and setting realistic expectations, as effects typically take several months to become apparent.
What blood tests should I ask my GP for if I am losing hair whilst on metoprolol?
Your GP will typically check thyroid function (TSH and free T4), a full blood count, and serum ferritin and iron studies, as thyroid disorders, anaemia, and iron deficiency are common and treatable causes of diffuse hair loss. Additional tests — such as vitamin D, vitamin B12, or a hormonal profile — should be guided by your individual history and examination findings rather than requested routinely.
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