I was prescribed a course of 250mg of Amoxicillin, 3 times a day for 7 days for an "supposidly" overgrowth of bad bacteria in the gut. The professor I saw didn't do a test for it, he thinks it is that! 
Anyway, day 1 I took one at 1pm, then again at 3pm. All went ok but felt a tad nauseous in the eve and had that awful 'amoxi' taste starting. Day 2 I took one again at 11am and then again at 3pm. Within the hour of taking the 3pm one I started to get awful tummy gripes and thought it was just my IBS playing up. It wasn't. I visited the toilet 4-5 times over the next 2 hours with diarrehoa
I then looked on the net to see what the adult dosage was and I was shocked to read that it was 250mg every 8 HOURS
I felt releived that it wasn't me rejecting the anti's.
All night that night I felt soooooooooo nauseous and felt that if I moved I would have been sick, needless to say I didn't sleep well!
I took another dose this morning at 8am and again within an hour I was on the toilet again. I have only been twice today so far and am due to take my next at 3.30-4pm.
Do you think I had took them too close together and hence why I am still suffering and felt so awful last night? Or is this normal and I will have to put up with it until saturday? (which is when the course finishes)
I wouldn't know if I was allergic but I have taken amoxi 17 years ago for a recurring urine infection for a 4 week course but had to come off them as they made me start to feel dizzy and sick. Would that have affected me years on?
Any help would be really really appreciated :)
Thank you