In this randomized, cross-over study 20 subjects who are undergoing testosterone (T) therapy
for the treatment of T deficiency will receive both subcutaneous testosterone therapy and
intramuscular testosterone therapy. One group will receive a SQ injection followed by an IM
injection and one group will receive an IM injection followed by a SQ injection. The primary
objective of this study is to measure testosterone concentration in men after these two
treatment routes and determine if there are any significant differences due to modes of
administration. Endpoints will include total serum testosterone and calculated free
testosterone. A questionnaire will also be administered to assess overall patient experience
with each route of administration.