With the 3 day half-life of test prop the most optimal frequency for injection would realistically be every day. Since the idea of injecting yourself every day is not something pleasant to most people, every other day injections have become the standard. While not “optimal” every other day injections have shown to be acceptable since, technically, the injection frequency should be days or less. First time users of test prop should start with a moderate dosage of 50mg every other day. I have seen the safe use of test prop at up to 150mg eod or 75mg ed. Keep in mind that ancillary drugs like a-dex or armoasin should be kept on hand or ran to keep estrogen levels in check and proper post cycle therapy protocols should be ran to promote a speedy recovery after cycle.