Cipro and a Z pak. Don't leave home without them.....
Can't get antibiotics without a prescription here in the UK. My doctor used to give me a travellers tummy antibiotic to take abroad in case I needed it but it's since been placed on a banned list. Doctors here in the UK are understandably loathe to prescribe antibiotics as a precautionary measure.
When eventually called, a nice Indian doctor prescribed antibiotics, antiemetics and various other potions which did the trick within 24 hours.