| Prophylaxis |
| Bismuth subsalicylate (Pepto Bismol) | 2 tablets or 2 oz of liquid 4 times a day while traveling | May reduce risk by one half. Avoid in persons with contraindications to aspirin. Stools may be blackened. |
| Treatment regimens |
| Ciprofloxacin (Cipro) | 500 mg orally 2 times daily for 1 to 3 days | Ofloxacin has less sun sensitivity than ciprofloxacin and a broader spectrum of coverage. Severe dysentery may require longer treatment. Contraindicated in persons >18 years of age. |
| Ofloxacin (Floxin) | 400 mg orally 2 times daily for 1 to 3 days |
| Single-dose ofloxacin plus loperamide (Imodium) | 400 mg of ofloxacin and 2 tablets of loperamide |