Post Cycle Therapy (PCT), though beyond the scope of this profile, needs to be commented on. Due to the highly suppressive nature of Deca-Durabolin, I will speculate that testosterone in a Deca-Durabolin-inclusive cycle needs to be run for at least 2 additional weeks upon cessation of Deca. We remember from the chart above that baseline testosterone levels took roughly a month to return. Hence, a nice long estered testosterone should be run about 2 weeks longer than Deca-Durabolin, to prevent having a lag in time when the Deca-Durabolin is not producing an anabolic effect, yet is still suppressing your natural testosterone levels. Id also suggest that a particularly aggressive PCT be run after your cycle; nolvadex , HCG , and perhaps clomid should all be utilized in an effort to restore your natural hormone levels as quickly and efficiently as possible.
Due to its chemical structure nandrolone is weakly exposed to aromatase (only 20% of the aromatizing activity of testosterone). However, not estrogenic effects are its main concern: nandrolone has a potent progestogenic activity (20% of progesterone). While binding to progestogenic pituitary receptors nandrolone causes increased production of prolactin, which in effect is very similar to estrogen: its effect presents in reducing testosterone production, increasing fat mass and in gynecomastia. To prevent these side effects prolactin inhibitors (cabergoline) shall always be at hand when on nandrolones cycle.