So there are clinics everywhere for "testosterone therapy." Is this safe for an older male? What are the long-term effects? I assume it's expensive, like most c

So there are clinics everywhere for "testosterone therapy." Is this safe for an older male? What are the long-term effects? I assume it's expensive, like most cosmetic/vanity medicine. How is it different from "roids" that powerlifters and other pro athletes are known to use? Or is it different?