Why are drug dosage forms tested for stability?

Drug dosage forms are tested for stability to ensure that the medication remains effective and safe throughout its intended shelf life. Stability testing is a critical component of the pharmaceutical industry’s regulatory and approval process for all new drugs.1

Evaluating the stability of a drug within its specific dosage form—such as a tablet or capsule—is essential to confirm that the product maintains its chemical integrity and its ability to release the active ingredient appropriately. This testing helps guarantee that the drug will achieve the desired bioavailability and therapeutic effect once administered to a patient. Without such verification, there is a risk that the drug could degrade or fail to release correctly, potentially leading to inadequate blood levels or unexpected interactions.21