Unlike the others here, I have had very bad experiences with Larium (unable to sleep the night of ingestion, horrible dreams for the next three nights, and some nausea). These symptoms prompted me to abandon the stuff four weeks into my 10 week assignment. Incidentally, I don't think I got bitten more than once or twice during my stay there (India). I will say that I felt like an idiot for spending $200+ because generic versions for were available (and easy to find) there for less than 25 cents per dose. Furthermore, I believe that quality differences between Larium and the mainstay Indian knock-offs are minimal, if any.