but if the OP is asking if taking deca without test, but taking cialis will yield a working weiner, the answer is no.
I learned that lesson trying to run tren only. You need a minimum of test in your system to get hard. Some people have enough on deca to load their weapon, many don't.
I figured I didn't have a gf while on the tren so it was no big deal, but oppertunity knocks when you least expect.