
Originally Posted by
Anthony Roberts
When you use a Nandrolone (like deca), your endogenous testosterone levels will quickly fall to nothing. What you need to do, to avoid sexual dysfunction, is to replace them to at least a physiological level (with a small amount of testosterone). When you run Deca at a very high dose, you are dealing with a very high level of prolactin, which is the hormone secreted just after the male orgasm, that makes you go limp. If you use too much deca, your levels of prolactin will always be high, and you'll find it difficult to get and maintain an erection, regardless of how much testosterone you use. Using a very high level of testosterone will help you get an erection, but in the presence of high prolactin, it will be difficult to maintain.
On a personal level, I typically run testosterone higher than any other compound in a given cycle, but then again, I never run deca anymore either...