Can I Get Mebendazole Withou A Prescription In Ontario, Canada?

Can I get Mebendazole withou a prescription in Ontario, Canada? I was prescribed one tablet for three days at 100 mg and after reading the insert learned I was to take two tablets a day for three days and the parasites still exist - Cutanea Larva Migrans. Doctors are not very helpful; rather quite dismissive. Thank you, Cynthia.