Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.
A common practice among those who run both testosterone and nandrolone phenylpropionate is to quit injecting the latter anywhere from four days to two weeks before stopping testosterone. The reason why is because NPP is pretty suppressive, so you can keep your libido going by running the testosterone just a little while after the NPP â€“ . for an 8-week test prop/NPP cycle, you'd quit the nandrolone after Week 7. As for specific PCT compounds you should be using, Nolvadex and Clomid are classics that should be dosed after NPP, and other steroids have started clearing your system. If your libido is really low, you might also want to consider hCG to bring it back.