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Other significant adverse effects of testosterone supplementation include acceleration of pre-existing prostate cancer growth in individuals who have undergone androgen deprivation; increased hematocrit , which can require venipuncture in order to treat; and, exacerbation of sleep apnea .  Adverse effects may also include minor side-effects such as acne and oily skin, as well as, significant hair loss and/or thinning of the hair, which may be prevented with 5-alpha reductase inhibitors ordinarily used for the treatment of benign prostatic hyperplasia , such as finasteride .  Exogenous testosterone may also cause suppression of spermatogenesis , leading to, in some cases, infertility.  It is recommended that physicians screen for prostate cancer with a digital rectal exam and prostate-specific antigen (PSA) level before starting therapy, and monitor PSA and hematocrit levels closely during therapy. 
Yes, you’re on the trailing edge of the bell-curve; it’s uncommon but certainly not unheard of or terribly unusual. In fact, it’s pretty understandable. This is often a transitionary period for people, trying to balance education with work and a social life – made all the harder if you’re one of the 60% of college students staring down the barrel of paying off those college loans. Some of you may have spent more time focusing on your studies or work. Others may still be in the middle of shaking off old identities and trying to work out social anxieties and inexperience.