Before you go
Since most vaccines can’t provide immunity until at least two weeks after they’re given, you should visit a doctor four to eight weeks before departure. Don’t forget to take your vaccination certificate with you (the yellow booklet); it’s mandatory for countries that require proof of yellow-fever vaccination on entry.
Bring your medications in their original, clearly labeled containers. A signed and dated letter from your physician describing your medical conditions and medications, including generic names, is also a good idea. If carrying syringes or needles, be sure to have a physician’s letter documenting their medical necessity.
Check if your health insurance covers you for medical expenses abroad, otherwise make sure you get extra travel insurance. Find out in advance if your travel insurance will make payments directly to providers or pay you later for overseas health expenditures (many doctors in Peru, though, expect payment in cash).