• Propecia leads to an increase in the testosterone in the body because testosterone which would have been converted into the DHT does not do so. The enzyme present in Propecia alters the production of DHT in the body leading to negative side effects. A man’s protection from the side-effects of estrogen can be diminished because Propecia reduces the amount of DHT in the body. Artificially lesser levels of DHT and higher levels of testosterone in the body can cause significant disasters in the male body like gynecomastia. Propecia decreases the production of female hormones like estrogen in the male body and can affect the normal sexual functioning.

• When consumed in appropriate amounts by the pregnant females, Propecia can also lead to severe effects on the health of the male embryo.