If you can get them in America at all, don't buy Strepsils, they are absolutely terrible.
I got hassled into taking one once, and it's pathetic. You are supposed to let them dissolve in your Mouth.
1. You end up with a mouth brimming with Saliva, so you have to swallow. This means juggling the blasted Strepsil, until it's wedged between the Tongue and Teeth.
2. This worked about 2 x, then third time it accidentally slipped down.
3. This was after 10 minutes. It felt like the damn thing had shrunk about 10%, and given me 5% benefit max, if that.