This 17aa alteration, which makes it possible for Anadrol to survive its first pass through your liver, also makes it very taxing on your liver. How taxing is Anadrol and how much weight can you gain from its use? Well, there was a 30 week study done on Anadrol and, as you can expect, a reasonable amount of side effects were noted. The fact that Anadrol causes some side effects has really never been in debate. But how effective was the drug? Well, first it should be mentioned that this study was done on people with AIDS related wasting, and they actually gained weight (8+kg) while the control group lost weight, and had increased mortality rates. (1). I suppose, if you're in a study because you have a wasting disease which is also a terminal illness, you don't want to end up in the control group. Anyway, weight gain in this study peaked at 19-20 weeks, though, so the  last 10 weeks weren't very productive in this respect. Clearly, you wouldn't want to run Anadrol 50 for 20 weeks, given its toxicity, but after that, any effect in terms of weight and strength gains would be negligible. So, with regards to sides from Anadrol, and the sheer fact that this study lasted so long (30 weeks), it should be apparent that they can be kept under control and the drug can be used safely. People are commonly told to limit their intake of Anadrol to 4 weeks or less I'm a bit less conservative and think you can easily run Anadrol for 6 weeks or more.

From personal experience, however, I can tell you that gains from Anadrol are quite dramatic for the first 3 weeks and then quickly level off. Unfortunately, I find that the side effects experienced from Anadrol (which include a headache, bloating, elevated blood pressure, and a general "unwell" feeling for me) remain for the entire duration of use. But I find as usual, side effects for this drug are pretty much half legend and half truth. Since Anadrol 50 is derived from DHT, it cant actually convert to estrogen (via the aromatase enzyme), and its not a progestin or a compound with progestenic activity so the estrogenic (?) side effects produced by it are of a very mysterious nature. It has been speculated that perhaps it can stimulate the estrogen receptor without actually being converted to estrogen and that's about as plausible an explanation as Ive heard.   However, things really get strange, when Oxymetholone has been used in studies to alter the female reproductive/menstrual cycle; in those cases, it has lowered plasma progesterone levels! (7)One would expect that an AI (aromatase inhibitor) wouldn't be of much use with this drug, but many have found that Letrozole (which has, in some cases been shown to reduce estrogen in the body to an undetectable amount)(6) can greatly reduce or even eliminate many of the more noticeable side effects of Anadrol, such as the bloating.