I was diagnosed with tonsillitis and given antibiotics. 500 mg penicillin 4 times a day. It started working within 2 days and throat back to normal size (still red with spotty bits but so much better) but about day 5 I started feeling v sick. I took less on that day and been taking 6 instead of 8 and I feel a lot better. Do u think my tonsillitis wii recur. I think I would have thrown up if I took 8 that day. Dr did warn I'd feel sickly.