The dissolution properties of oral medicinal drugs are affected by formulation and used to market over-the-counter medications. Acetaminophen is one of the most commonly used over-the-counter pain and fever-reducing medications with an estimated global yearly market value of over $350 million US dollars . Acetominophen gelcaps are, in general, sold at higher prices than company-matched standard tablets. Standard acetaminophen tablets and rapid or fast-release gelcaps from five major US companies were analyzed using the industry standard test for dissolution. Results indicate that acetaminophen gelcaps marketed as rapid or fast-release are slower acting under in vitro dissolution conditions compared to the company-matched tablet dose.
Keywords: dissolution; acetaminophen; rapid release; fast-release; quick release; standard release; medication release; over-the-counter; generic drugs.