The use of Lariam as both treatment and prevention of certain strands of malaria have made it one of the most used drugs of its kind. Lariam works through the blood stream to attack and kill the malaria parasite, and prevent further multiplication of this deadly disease. How the drug actually kills, the parasite is scientifically unknown suffice to say that it works and is legally sound.
The brand name Malarone has the same active ingredient – “Atovaquone/Profuanil” – as the generic unbranded prophylactic. Generic drugs are chemically identical to, and therefore as effective as the brand name version, but they cost a lot less.