I was put on Metronidazole quite a few times for an antibiotic reistent super-big C.Diff infection that ruined my life over the 18 months that it ran its course. I drank without issue.

This contraindication appears to be be a myth. It always disturbs me that both doctors and pharmacists continue to push this myth, even with warning labels, yet there is no evidence. I have consistently been stunned at how rarely men and women of medicine are scientific at heart.

https://www.ncbi.nlm.nih.gov/pubmed/25223673
"It is common practice to warn against intake of alcohol (ethanol) when taking metronidazole because of the risk of an effect similar to disulfiram (Antabuse)."
"No in-vitro studies, animal models, reports of adverse effects or clinical studies provide any convincing evidence of a disulfiram-like interaction between ethanol and metronidazole."

"The warning against simultaneous use of alcohol and metronidazole appear to be based on laboratory experiments and individual case histories in which the reported reactions are equally likely to have been caused by ethanol alone or by adverse effects of metronidazole. Recent research does not confirm a clinically relevant interaction between ethanol and metronidazole."

https://www.ncbi.nlm.nih.gov/pubmed/12022894
"Metronidazole did not raise blood acetaldehyde or have any objective or subjective adverse effects when used together with ethanol." ... "This study shows that metronidazole does not have an effect on blood acetaldehyde concentrations when ingested with ethanol and does not have any objective or subjective disulfiram-like properties."