^^^^ What guns said. Standard TRT IMO is 100-200mg of test a week divided into 2-3 small shots to keep blood levels stable. You don't come off it is for life, unless you encounter one of the health issues Guns mentioned. Some add HCG to boost test levels further as well as keeping your testes functioning and full. I would get bloodwork done every 6 months to get things like E2, HDL, LDL, RBC, etc. checked.