I've been experimenting with Indian made tadalafil that I ordered on the internet. it has been working great, but Im plagued with some bad side effects. Mainly pain in my body(especially my lower back), loose bowels, foggy head, acid reflux...It's gotten to the point where I don't want to take it anymore, but I'm having trouble performing for the Mrs. Is this maybe a bad batch? any thoughts, or any other ideas for me? this my first experience with any of the different types of ED drugs. I'm a patient of defy and plan on discussing this at my next appointment.