The best blockers are the GnRHa medications which can be taken
as a nasal spray or an injection, but they are expensive if you are having to
fund them yourself. If your funds are limited and you are trying to reduce the
effects of testosterone then finasteride is the simplest and safest but maybe
not the most effective. Spironolactone and cyproterone are probably equally effective, but do require
you to have more blood tests. Bicalutamide is no longer recommended because of
the risks of liver toxicity.