What is an anti-androgen?

Androgen (testosterone) blocking medicines can work in three ways:

  • Reduce the production of testosterone in the body
  • Stop testosterone having an effect on the body
  • Reduce male features of the body

The commonly used anti-androgens are:

Finasteride - a very safe and simple tablet that works well in the majority of cases. This is the one we usually start with before moving on to stronger ones if needed.

Spironolactone - a water tablet used to treat heart failure which is also known to reduce testosterone.

Blockers - these puberty blockers (GnRH analogues) suppress testosterone production completely, but are given by injection or nasal spray and are much more expensive.