Side Effects
Finasteride has several possible side effects.
In the last 12 months, the MHRA has asked men to be aware that a link between taking Finasteride and sexual side effects has been discovered. Some men who take this medication may experience a loss of sex drive, and/or problems with getting or maintaining an erection (known as erectile dysfunction or ED). If you experience any issues with sexual function while taking Finasteride, it’s important to speak to your doctor right away. You should also be aware that sexual side effects may persist, even if you stop taking Finasteride.
Similarly, psychiatric side effects such as depression, low mood, anxiety and, in rare cases, suicidal thoughts, can occur. For this reason, you may be asked questions about your mental health as part of the consultation process. And as people taking Finasteride may not necessarily realise that they are experiencing low mood, it’s advised to let friends and family know about this side effect and ask them to stay vigilant for it too. And if you have any concerns, please contact your GP.
Another rare side effect is tenderness of the breast tissue. Although instances of breast cancer among Finasteride users are rare, you should tell your doctor if you experience any changes in your breast tissue (including lumps, pain or discharge from the nipple).