I learnt the hard way you should not drink after being on two lots of strong anti biotics, even if you had finished them a couple of days beforehand!
I was rather poorly lol It wouldnt have been so bad but as I work in a school and it was also one of the teachers birthday the same day, I was out with my daughters teachers! (One of them had to kick the toilet door in to get me out! Again, it wouldnt have been so bad except I was still sat on the loo with my head resting on my knees.......... with my bare bum stuck up in the air! lol)
*cringes*