Proviron will work for most guys on Deca only cycles but it takes a few days. If your libido doesn't improve by the 5 day double your dose. Then if you still get nothing after a couple more days then you're going to be one of those, like me, that absolutely has to add test to make the Proviron work. Not much just 200mg will do it. Then even the worst looking women get a second look and you'll be chasing anything female.