A medication used to treat hair loss has come under scrutiny following a significant increase in the number of reported side effects.
According to the UK medicines regulator MHRA, cited by The Sun, 547 reports of possible side effects were recorded in 2025. By comparison, the figure was 66 in 2020.
Authorities respond
Finasteride is a common used treatments for hair loss. The drug works by affecting a hormone that plays a role in the development of hair loss, The Sun reports.
In response to the concerns, the MHRA decided in 2024 that finasteride packaging must include a special warning card.
Also read: The surprising ways honey may affect your body
The aim is to make users aware of the known risks associated with the treatment.
Both physical and psychological problems
The reported side effects include skin rashes, acne, nausea, and bad breath.
Cases of depression, anxiety, and panic attacks have also been recorded, according to the MHRA.
The regulator emphasizes that all medicines can have side effects and that the benefits and risks should be assessed together with a doctor.
Also read: Peanut butter’s surprising health perks
Other side effects
According to the MHRA, 159 men reported erectile dysfunction, while 67 reported a reduced sex drive.
In addition, cases of testicular pain, enlargement of breast tissue in men, and the rare condition Peyronie’s disease, which can cause curvature of the penis, were recorded.
Also read: Why perfectionists often struggle more when life changes