Generic pharmaceutical drugs are drugs that have the same clinical effect on the body as the brand-name drug they are based upon. They are identical in dosage, safety, effectiveness, strength, stability, quality and usage. This similarity is possible due to the same active ingredient and the rigorous testing that generic drugs go through during the certification process.

Generic pharmaceutical drugs differ from the original brand-name drug primarily in production process and in overall cost. They do not have to repeat clinical studies that have been already been conducted by brand-name medicines and do not have the same upfront research costs. Additionally, generic pharmaceuticals can be formulated in a different, more affordable method than the brand-name drug.

Generic pharmaceutical drugs are critical to lowering the prices and availability of crucial medicines to consumers. Without generic pharmaceutical drugs, many would lose access to important medicinal therapies.