Dihydrotestosterone (DHT) (referred to as androstanolone or stanolone when used medically) can also be used in place of testosterone as an androgen. The availability of DHT is limited; it is not available in the United States or Canada, for instance, but it is available in certain European countries, including the United Kingdom , France , Spain , Belgium , Italy , and Luxembourg .  DHT is available in formulations including topical gel, buccal or sublingual tablets, and as esters in oil for intramuscular injection.  Relative to testosterone, and similarly to many synthetic AAS, DHT has the potential advantages of not being locally potentiated in so-called androgenic tissues that express 5α-reductase (as DHT is already 5α-reduced) and of not being aromatized into an estrogen (it is not a substrate for aromatase).
Testosterone patches can be either scrotal or non-scrotal and are also known to be effective in increasing the body’s T-levels. The downside to using this however is that it tends to irritate the skin. Testosterone gels are known to be significantly absorbed by the skin and have a near-instant absorption rate which lasts throughout the day. And there’s also the buccal testosterone which is known to produce even better results than the patches when applied to the gums. The side effects of that however often include bitter taste in the mouth and some irritation to the gums.