i did this once but its not the smartest thing to do.i did a cycle of cype once,when i came off i didnt use clomid or hgc.waited about 10 days,went to a urologist and told him i couldnt get an erection,and i felt all tired and it was killing my relationship with my girlfriend.he did blood work and my free testosterone measured 140ng normal is around 6-800ng.so he diagnosed me with having hypogonadism and put me on test enthelate,the trouble with that is in order to get enough for a good cycle you have to horde it up for like 3 months.plus a test only cycle is not the best