Deca-durabolin (Nandrolone decanate) 15 days half life. say i took my last shot of 400mg right? 15 days later i would still have 200mg in my blood. 15 more days go by and still 100? if this is correct how can i start my pct 2 weeks after my last shot? wouldn't i still have it in my bloodstream? same goes for prop half life is 4.5 days.so why would you start pct 3 days after last shot of prop?