Sh. Narender Ahooja ji in Conversation with Dr. Tarun Virmani and the topic discussed was, What are over-the-counter (OTC) medicines? Over-the-counter (OTC) medicines are those that can be sold directly to people without a prescription. OTC medicines treat a variety of illnesses and their symptoms including pain, coughs and colds, diarrhea, constipation, acne, and others.