I personally would only take low doses of deca(100-200mg/week) while on fina for my joints. The reason the two do not make a good couple is they both effect progesterone and the only thing to combat it is winny and ru486. If you are prone to pr sides, combining the two is asking for trouble. Everyone responds differently though. If your done with the deca and just starting fina, you likely wont have any problems as the fina blood levels rise and the deca levels drop. Fina also seems to be a tad kinder where PR sides are concerned, but once again it varies by individual.