A Prohormone cycle will usually last 4-6 weeks, afterwards you should follow up your cycle with proper Post Cycle Therapy (PCT) such as using Clomadex .
PCT is another course of tablets designed to keep estrogen at bay and increase your testosterone production to regulate your hormones back to normal. Prohormones are essentially synthetic testosterone, so superior to your own that your body will slowly start to decrease production of its own, so PCT is vital in order to get your body back in anabolic regularity.
Many advanced users stack several compounds in order to get maximum results from their cycle. Normally when your stacking these types of products its best to use single compounds instead of premixed stacks. The problem with using a premixed stack is you may get more of one compound than you want. Most of these products have sweet spots. Lets use h-drol for an example according to many of the forums out there 75mg is the sweet spot for this compound. Now lets say you have a halodrol product that is mixed with 10mg of Methylstenbolone. In order to get the proper amount of hdrol you will get more than the recommended dose of M-sten.
According to the available sources it is a preparation which is very often abused by strength athletes and bodybuilders. In addition to the high androgenic efficiency, its anab. effects are reportedly also very high. Unlike other highly androgenic preparations it does not aromatize, because the active substance is not converted to estrogens. That is also one of the reasons why no feminization phenomena occur due to usage of this preparation. Water retention is also very low, which makes it suitable to be used especially in preparation for competition. Its effective combination with a diet poor in calories, but rich in protein is often reported. The result is an excellent post-workout recovery, hard and brutally dense muscle mass with highly "veiny look". A significant strength potential of the doping sinner abusing this preparation is a must. (source: Igor Kopček, Na rovinu o dopingu)