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.