Yeh, I don't why your trying to go full defence mode on oral minoxidil, as I said for most it will be fine, but his side effects are the exact ones associated with oral minoxidil. Water retention and heart burning are the main stated potential effects of the drugs, you don't have to be a doctor to realize its the drug causing this since they started while he's only been on it for two weeks, and tbh minoxidil a growth stimulant, I would not use it unless your using fin or dut as its pointless to regrow new hair if your losing hair at the same time