http://www.fda.gov/AboutFDA/CentersOffices/OfficeofMedicalProductsandTobacco/CDER/ucm093471.htm
Center for Drug Evaluation and Research, U.S. Food and Drug Administration
Over-the-counter (OTC) drugs products are those drugs that are available to consumers without a prescription. The FDA's Center for Drug Evaluation and Research oversees OTC drugs and offers these consumer guidelines.