The medication is extracted from the stem of the pineapple plant (Ananas comosus) by a standardised process, and each lot has to be analysed for its chemical composition. It contains a mixture of proteolytic enzymes, the main compound being stem<unk> <unk> is thought to be the active ingredient, but this has not been determined in studies. The gel basis contains water, polyacrylic acid as a gelling agent, and a disodium hydrogen phosphate/sodium hydroxide buffer.
Bromelain 
Tetrodocain
Ibogaine
Noribogaine
Pramocaine
Iontocaine
Oxybuprocaine
Levobupivacaine