Active substance

Quercetin

3 products from 3 companies contain this in United States.

3 without prescriptionLiquid

Available without a prescription

Quercetin6X/mLWithout prescriptionLiquid Deseret Biologicals, Inc. · Quercetin Quercetin6X/mLWithout prescriptionLiquid BioActive Nutritional, Inc. · Quercetin Quercetin 15409X/29.5mLWithout prescriptionLiquid Professional Complementary Health Formulas · Quercetin

Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.