What are peoples thoughts about taking antimalaria drugs to go to Costa Rica? I have mixed thoughts, and in speaking with my doctor, he seems to have mixed thoughts as well. The CDC website recommends it for travellers going to most of Costa Rica. Has anyone here taken any of the antimalaria drugs, and if so, how were the side effects...the last thing I want on my honeymoon is to be suffering from gastrointestinal problems. I would love to hear what other people have done when travelling to Guanacaste.