Do your research. I mean real fact based research, not "bro science" or ambulance chaser lawyer "news reports". Just like any drug/therapy there are things to be looked out for. There will always be people who have bad reactions. You will most likely NOT be one of those people. That being said, being your own best advocate for your own Healthcare starts with being knowledgeable about the facts and knowing what you want to see in your treatment.
I wondered if I had low T, turned out I was eceptionally low. A small bi weekly dose now has me up to a good "normal" level. My other labs are also great, my platelet count is good (some guys react to test by having their platelet count go sky high, therefore thickening the blood, causing.... you guessed it, stroke and heart attack!), my PSA is very low(0.54 out of up to 4.0, for "normal" ranges..) and my mood and physical feeling of well being is much improved. Doesn't work this way for everyone, but if you go in with a full boat of knowledge and take the right path, it may work out.
You wouldn't go in a 2 week wilderness hunt without planning, why go into your Healthcare without knowledge and a plan?