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Let‘s say someone would want to switch from Testosterone Enanthate injecting 2x/week (already on it and saturated) to Testosterone Undeconate: 1. How would the protocol be? 2.1. With the long half life, switching to something like only injecting once every week or maybe even two times a month would be possible, right? 2.2. But in comparison how stable would the levels become?

AlphaMD's Answer

Typically when switching to a long acting Esther, you would keep the same dose, but just increase the time between injections. For undecanoate, you typically would do an injection every 2 weeks. Then you would adjust the dose from there.Half lives of all medications vary, but whether it is an antibiotic, aspirin, or testosterone; it takes 5 half lives for a dose of medication to be out of your system. With testosterone undecanoate, the half life is 18-20 days, that means that it takes 90-100 days for that shot to be entirely out of your system. That also means it takes 450-500 days (5 half lives) to be at steady state with undecanoate.

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