Originally Posted by Debbiec
My husband used to get sick every year until a doctor friend of ours prescribed Ciprofloxacin, preventatively. He starts taking it 5 days before we go, takes it while we're there, and he hasn't been sick once since. Yes, it's an antibiotic, and no, it's not for sure that anything bacterial makes him sick, but.....it works.
You can buy it OTC in Playa, as well, but my husband is a firm believer in the advantages of starting it before we go. One brand name is Cipro, and it's likely the same kind of drug that Jimontheriver points you to.
most pharmas will not sell antibiotics OTC any longer
it is now illegal to do so in mexico