Does metoprolol cause hair loss?
Hair loss was not a commonly-reported side effect during clinical trials of metoprolol. However, rare reports of reversible hair loss have been reported by patients taking it. After stopping the medication, hair grows back again.
Typically, hair loss doesn’t occur until a few months after starting metoprolol. This is because it can take 2-5 months for hair to fall out after a trigger, like metoprolol, is present. At this time, you may notice clumps of hair coming out during brushing or showering.
Why does metoprolol cause hair loss?
It is thought that beta blockers like metoprolol can cause hair that is in the anagen (growth) phase to switch into the telogen (resting) phase. When they switch back into the growth phase, the hair strands fall out. This can cause a large amount of hair shedding to occur, which is called telogen effluvium.
What should I do if I am having hair loss from metoprolol?
If you notice more hair falling out than usual while taking metoprolol, speak to your healthcare provider. They will evaluate you and help you determine whether the hair loss is due to metoprolol or another cause. If it appears likely that your hair loss is being caused by metoprolol, your healthcare provider may suggest an alternative treatment option.
References
Graeber, C. W., et. al. 1981. Metoprolol and alopecia. In: Cutis. Accessed on August 30, 2024 at https://pubmed.ncbi.nlm.nih.gov/7318502/
Hughes, E. C., et. al. 2024. Telogen Effluvium. In: StatPearls [Internet]. Accessed on August 30, 2024 at https://www.ncbi.nlm.nih.gov/books/NBK430848/
Metoprolol succinate [package insert]. Updated March 2024. BluePoint Laboratories. Accessed on August 30, 2024 at https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=99ecc717-38ab-4d00-8bf2-86a41b1c7977
Metoprolol tartrate. Updated May 2023. Alembic Pharmaceuticals Limited. Accessed on August 30, 2024 at https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=cb76a73f-549a-4170-b96a-f93ed7e09464
Phillips, T. G., et. al. 2017. Hair Loss: Common Causes and Treatment. In: American Family Physician. Accessed on August 30, 2024 at https://www.aafp.org/pubs/afp/issues/2017/0915/p371.html
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