There is a lot of talk about negative effects that are widely known. At a bodybuilder or high medicinal level, you can work out multiple times per day at max effort without getting tired and only hungry or sweaty. Your brain will work at the highest efficiency but you may have issues applying it. You may not even need to sleep depending when you take it and for how long.
Using it will either scare you to stop or you can take them until your kidneys fail and you’re in a wheelchair like Ronnie Coleman. If you live long enough maybe you end up with testicular cancer or it supercharges your brain and you end up curing cancer.