I have also used some of the medication listed on the forum. I have used Malarone a few times but found that if I am using it for longer than 2 weeks I really get sick with dreadful stomach problems.
So, after extensive research, I now always stick to doxy and have done so for the last three years. The only other tip I would add here is that if possible include some natural yoghurt in your diet. I appreciate that you can't get the stuff everywhere where we are travelling but it helps to replace some of the bacteria that have been killed off by the doxy!
Take care now!
DA87