rob99 - I spent 3 months in Malaysia - had to take a variety of anti - malaria drugs; involved something like one type of tablet every day + another type once a week - Don`t know about the side effects you`ve mentioned, but I know that some of my colleagues (on a different drug than myself )suffered from hallucinations and nightmares, caused by their medication.
The pills I took were recommended by the BA travel clinic at LHR - although you have to take them more often, the side effects are negligible.
I think they were called paludrin and ????? - anyway give the BA travel clinic a ring; they`ll sort you out with the info you need.