don't do alcohol and antibiotics mmmkay...

this is what i learnt after ONE cocktail with a colleague in cape town recently...

Do not drink alcohol while you are taking metronidazole and for at least 3 days after you stop taking it. You may have unpleasant side effects such as fast heartbeats, warmth or redness under your skin, tingly feeling, nausea, and vomiting.

http://www.drugs.com/metronidazole.html

yup it's true, the following day i felt like i had been at sea for a month, and the ground was still moving...