Went to doc complaining of headaches. Doc advising might be sinus infection and gave cefalexin for the infection and acupan for headaches, also a new nasal spray for the sinuses. Took all three at once in the loo when got back to work. 2 acupan and 1 cefaxlexin. Forty-five mins later, felt clammy sweat coming on and quite faint. Really didn't think I would make it to the ladies and thought would collapse on the department floor. Unsure whether is the cefalexin or acupan maybe combination of both. At this time of writing unsure whether to continue with course or just put up with the headaches. Side effects for acupan appear to be the same, faint, sweats, shakes. Don't imagine is a good idea to take two drugs with same side effects. Thinking of going back to docs for something I'm more familiar with - amoxycillin - no side effects with that and maybe good old co-codamol!! It was certainly true for me that taking the medicines resulted in feeling more lousy than the initial complaint.