Proviron can be a great addition to any cycle. It binds to SHBG, freeing up test, therefore making test more effective and it is great to help with sexual function. It also gives a harder look to the muscle. You can start it from Day 1 of a cycle, if you like, or you can use it later, to battle the build up of SHBG, which increases through a cycle. I've seen 25mg have an effect, but I'd prefer to go a little higher, like 50mg. Some guys push it to 100mg. So lets say you were using a test cycle for 16 wks. This would be a great way to add it in

1-16

Test E

adex

9-18 

Proviron 50mg ED

Since test e takes 2 wks to clear, you can continue using the Prov for 2 additional wks as you wait for test to lower. Then at wk 19, you would start a traditional PCT