Hi,
For my trips to Africa I use Doxycycline (an anti-biotic). I was offered laruim by my GP when I explained that I would be on sojourn in Africa. However, he quickly withdrew that recommendation when I explained that I would be piloting.
In my experience the only side affect of Doxycycline was making my skin extra sensitive to direct sunlight.
If you do get a prescription for doxycycline you may find that its rather expensive. A seven month supply for me (one a day) worked out at £200 odd. I managed to get it cheaper through a family member.
Apparently larium has some pretty nasty side-affects including hallucinations
as stated by Blinkz.
Best of luck
df1