As with all injectable testosterone contraceptives, one can expect a considerable gain in muscle mass and strength during a cycle. Since testosterone readliy converts to estrogen, the acquired mass of this drug is likely to be accompanied by a little water retention. Loss of definition of course makes Testocyp Test Cypionate 250mg 10 amps a very bad choice for dieting or cutting phases. The level of excess estrogen caused by this drug can also cause one to develop gynecomastia fairly quickly. He would notice an uncomfortable pain, swelling or lump under the nipple, an auxiliary drug like Nolvadex should be added immediately. This will reduce the effect of estrogen considerably, making the steroid much more tolerable to use. Those who have a known sensitivity to estrogen may find it more beneficial to consume auxiliary drugs such as Nolvadex early in the cycle, in order to prevent the estrogen associated side effects before they become apparent.