Proscar can hardly be categorized as ‘safe’ because it can cause breast enlargement, reduced libido and impotence.

The use of Finasteride (Proscar) for the prevention of cancer is limited since it only prevents the harmless type of prostate cancer (the SKY Stage.) Proscar can hardly be categorized as “safe” because it can cause breast augmentation, reduced libido and impotence.

—Statement (via Twitter) in response to study titled Long-Term Effects of Finasteride on Prostate Cancer Mortality, January 29, 2019