I’ve been prescribed the above drug (250mg x 4 daily) for throat/chest problems as I’m allergic to penicillin. Since taking it (2 days now) I’ve had really bad stomach aches, diarrhea and nausea (no vomiting). There’s no signs yet of the throat/chest problems clearing up at all. Am feeling in a pretty bad way as I have Chronic Fatigue Syndrome/ME as well and so can barely get out of bed at the moment.

Should I continue taking the antibiotics as normal? Will the side effects get better or will they be as bad/get worse until I’ve finished the course of these antibiotics? [I'm 15 by the way...]