When sourcing Finasteride Tablets, the most critical factor is the Active Pharmaceutical Ingredient (API) purity, which should typically be ≥99%. Buyers must ensure the product complies with international pharmacopoeia standards such as USP (United States Pharmacopeia), BP (British Pharmacopeia), or EP (European Pharmacopeia). Additionally, verify the dissolution rate and content uniformity to ensure therapeutic efficacy. For B2B procurement, always request a Certificate of Analysis (COA) for every batch to confirm chemical composition and safety.