This article is from the Impotence FAQ, by Sine Nomine llama@drizzle.com with numerous contributions by others.
Probably not. Only about 3% of cases of Erectile Dysfunction are
helped by testosterone injections, mostly because most men with
erectile difficulties don't have testosterone deficiencies. Adding
hormones only helps if you're got hormonal imbalances, which are
fairly rare, to begin with. If you do have a testosterone deficiency,
you will likely be given shots or transdermal patches. The risks of
testosterone replacement therapy far outweigh the benefits in men who
have or have had breast or prostate cancer, and it is not prescribed
for them.
 
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