In Reply to: Are Malaria tablets available in Bali? posted by Rosa on Sunday, 30. November 2008 at 02:36 Bali Time:
AUS$8 for 30 tablets of chloroquine, and you do not need a presciption. Not sure about Malarone though.
The site below is excellent, Scroll right down to see the recommendations for the areas adjacent to Bali.
I usually take chloroquine with me and assess the risks (by word of mouth) when I get to my destination. If its bad I'll leave immediately: sometimes entire villages are affected, and they'll tell you straight away, other times there is only the odd case, but its always around, especially in the wet season.