I got a Prescription Last April from my Dr. in Winnipeg. It was called Vermox or Mebenazole. Cost was $88.00 from Costco. Not all pharmacies have it though. My Dr. says children mostly contract it as they sit in the sand for longer periods. Adults can get it by walking in closer proximity of the hotels in the dry sand (where the cats do their business). The medicine started to kill the worms within 2 days. All is well now. I believe i got them because I had a blister that broke open. I also have been going for years and this is my 1st time getting this. I will still do the beaches and resort grounds but be more careful of broken skin or sores.