Extended release (ER) refers to a formulation of medication designed to release its active ingredients slowly over time. This allows for a more consistent level of the drug in the bloodstream, reducing the need for frequent dosing. ER medications are often used for chronic conditions, providing longer-lasting effects and improved patient compliance. These formulations are commonly found in various medications, including those for pain management, hypertension, and mental health disorders. By minimizing peaks and troughs in drug levels, extended release helps maintain therapeutic effects while potentially reducing side effects associated with rapid absorption.