How long to wait?

I have a friend who had been running tren awhile back and is experiencing joint pains? He was considering taking deca and I told him that running the two together would cause gyno? How long should he wait to start deca, remember he has been off of tren acetate for a month or so?

EQ does the same thing for the joints as deca for many.

IMO, time on=time off. Had the same probs running tren. My shins felt like they were going to pop while doing cardio, but I still love it.