In the past I have used conventional anti-malarials and have been very ill from the side effect (Hallucinations, vomiting, nausia, loss of ballence, nightmares) - I swore that I would never travel anywhere that required me to take them again. When I discovered Dermal 200 this opened the travellers door to me again. We have recently returned from a far east tour visiting the more remote parts of Bali and Lombok. We both used Dermal 200 and we completely satisfied with the absolute lack of side effects and the slightly brandy flavor of the spray. It was easy to transport, mess free and although we can't say for definate stopped us contracting malaria we don't have it now!!! Oh and by the way, I was bitten 48 times!