I see why you did that, as you were apparently treating withdrawal problems, but start up
side effects are pretty common. Some of these
go away as your body gets used to the drug and some don't, and it's a very individual thing. But it isn't anything particularly attached to just these two drugs, it's all of them. Even aspirin eats the lining of the stomach. So these might go away with time and they might not. Only time will say.