I was taking Lariam when I was in Africa, had to take it for 16 weeks all in all and I didn't get any side effects (not that noticed, but I have a tendency to irrational and mad behaviour anyway.)
But I know some people who took Lariam and had problems with it, one guy had the problem that it took him about 1 hour each morning to get into gear.
The best thing is to discuss it with the Tropical Specialist and read through all the information on all the different Malaria pills. And then decide based on what's the lesser evil is for you. They all have certain possible side effects, it's just to choose which ones. I opted for possible nightmares against Sunburn.
If you do decide on an antimalaria pill, check in the first 2 weeks for side effects, that's when they usually occur. And for Lariam, you have to start at least 2 weeks before getting into the Malaria Zone anyway.. So there's plenty of time to change if you do get side effects.