all aas cause increased stomach acid production, which can lead to heart burn and acid reflux. steroids act directly on DNA, which in turn signals your body to increase protein synthesis, and one way to increase the amount of protein avaliable for synthesis is to speed digestion. in order to speed digestion, the stomach produces a greater amount of hcl than normal.
try a teaspoon of baking soda whenever you start feeling any discomfort. sodium bicarbonate buffers hcl and will get rid of heartburn immediately, and most of the time it won't come back for days or weeks. i used to get heartburn all the time- tried this, and now i get it once or twice a month, tops