When sourcing Ivermectin API (Active Pharmaceutical Ingredient), it is mandatory to ensure the product complies with international pharmacopoeia standards such as USP (United States Pharmacopeia), EP (European Pharmacopeia), or BP (British Pharmacopeia). Buyers must verify that the manufacturer holds a valid GMP (Good Manufacturing Practice) certificate and a CEP (Certificate of Suitability) or DMF (Drug Master File) number. These documents ensure the chemical purity, potency, and consistency of the API for pharmaceutical or veterinary formulation.