Flagyl versus Alcohol (metronidazole)
Another type of antibiotic that comes with a specific warning not to take alongside alcohol is metronidazole. Used to treat dental infections, infected leg ulcers and pressure sores, it’s thought to cause the same list of symptoms as the previously mentioned cephalosporins. This link has been disputed since a 2003 review of studies found a lack of evidence to support it, and a very small controlled study in which Finnish men given metronidazole for five days suffered no side effects when they consumed alcohol. The authors concede that this doesn’t rule out the possibility that a few individuals are affected, and the current advice is still to avoid alcohol when taking it.
BBC article 17 September 2013