Over-the-counter (OTC) drugs are medications available without a prescription that are used to treat a variety of common health issues. They help manage symptoms such as pain, fever, colds, allergies, heartburn, and minor skin conditions, providing easy access to relief for everyday ailments. OTC drugs are widely used for their convenience and efficacy and include categories like analgesics, antihistamines, decongestants, antacids, and topical creams.