Source:http://linkedlifedata.com/resource/umls/id/C0013231
NCI: A medicine or device that can be bought without a doctor's order or prescription.,MSH: Medicines that can be sold legally without a DRUG PRESCRIPTION.,MEDLINEPLUS: <p>Over-the-counter (OTC) medicines are drugs you can buy without a prescription. Some OTC medicines relieve aches, pains and itches. Some prevent or cure diseases, like tooth decay and athlete's foot. Others help manage recurring problems, like migraines. </p><p> In the United States, the Food and Drug Administration decides whether a medicine is <a href='http://www.nlm.nih.gov/medlineplus/drugsafety.html'>safe</a> enough to sell over-the-counter. Taking OTC medicines still has <a href='http://www.nlm.nih.gov/medlineplus/drugreactions.html'>risks</a>. Some interact with other medicines, supplements, foods or drinks. Others cause problems for people with certain medical conditions. If you're <a href='http://www.nlm.nih.gov/medlineplus/pregnancyandmedicines.html'>pregnant</a>, talk to your health care provider before taking any medicines. </p><