I bought this a while back when looking for the same brand new of medipaste. Looking at the ingredients it's very similar, but it's in a spray bottle which has to be shaken vigorously before use. I've been using this as a sort of antibacterial spray after waxing or epilation in an effort to reduce ingrown hairs but can't really say whether it works- do I get only 1 or 2 because it's good, or should I be getting none at all. On a spot that got hammered with the wax, it does sting briefly.
We aren't rating this very highly but in defence of the serum, the instructions say that it should be used wherever you remove hair, using words which imply that it should be used more often than just after hair removal. If it's truly the presence of bacteria that starts the ingrown on it's journey then keeping the area clean should be part of the daily routine. But who remembers to use it everyday? Not me. I'd rather treat the ingrown as it arrives and the medipaste product is very good for that.