Pyrantel pamoate is the anti-helminic chemical used to treat pinworm parasites. Unfortunately, you were not sent what you ordered... I purchased the pyrantel pamoate to take as the last step in my long-term parasite detox. From what I have read, you only take one dose of pyrantel pamoate because it kills all the parasites at once. Therefore, you risk more herxing, which is VERY uncomfortable.... I'm hoping most of my parasites are already gone by the time I take the pyrantel... 💞