yes if your cycle is 16 weeks longs , u shouldnt cycle again for another 16 weeks. u dont use oral on their own , u need test with them , but if u do a test cycle with orals , liver protection is a good idea . after pct u DONT need an anti-estrogen , however u need one during the cycle , read all the stickies at the top of the forum page if u are interested in learning more . however if u are not 21 or older, dont consider aas(steroids) until you are older, your body hasnt developed yet and u risk doing alot of damage