Hair loss drug used by Donald Trump can cause sexual dysfunction and bad mental health, says watchdog

A common hair loss drug for men, used by Donald Trump, can cause suicidal thoughts and sexual dysfunction, the UK’s medicines regulator has warned.

An alert from the Medicines and Healthcare products Regulatory Agency warned men taking finasteride to “stay vigilant” over potential side effects impacting mental health and sexual function.

Finasteride is a medicine used to treat hair loss in men and was reportedly used by former US president Donald Trump. It is also used to treat enlarged prostates.

According to the MHRA, there have been reports the drug can cause a depressed mood, suicidal thoughts and sexual dysfunction including a decreased sex drive.

It said there is a lack of awareness over these potential side effects and so has issued a safety alert. This means packaging for the drug will include an alert to the side effects and what to do if users experience any.

Patients have been warned to inform their prescriber of any history of depression or suicidal thoughts and to immediately stop treatment and contact their doctor.

Healthcare professionals have also been asked to monitor patients for such side effects.

According to the MHRA’s database, since 2020 there have been five reports of “suicidal and self-injurious behaviour” where the outcome was fatal and 41 reports where the outcome was not fatal.

The MHRA was prompted to review the safety of the drug following concerns raised by patients over the side effects.

It found despite the product information warning of the risk of depression and suicidal ideation the side effects were not well known by prescribers and patients.

​Dr Alison Cave, MHRA Chief Safety Officer, said: “It’s crucial that patients are aware of vital information about the medicines they’re