3. Visit a travel clinic: There are lots of health risks for Americans traveling to India so going to a travel clinic will help protect you from getting sick while abroad.
The two big things to watch out for are Malaria and contaminated drinking water. To prevent against malaria, the doctor will prescribe an oral medication that you start taking about two days before you land. If you have a weak immune system, they might advise you start taking it soon. It is suggested that you take it the whole time you are there and for a couple days upon returning. I found if I take it on an empty stomach it makes me a little sick and gives me very vivid dreams so I suggest taking it in the morning with breakfast.
The water is the other big issue over there. It is vital that you do not drink it. While this might seem easy at first, it is a little trickier than that. It means keeping your mouth tightly shut when showering, brushing your teeth with bottled water, not eating any raw veggies or fruit with the skin on it, and avoiding seafood.
Bottled water in Kerala, where I was, costs anywhere from 30-100 rupees. While this is not very much it is something to factor into travel expenses.