Online pill identifiers are available on several websites, including Drugs.com, RxList, Pillbox and WebMD. Pill identifiers use information, including the pill's color, size and imprint, to determine what the medication is, according to RxList.
In addition to identification, Pillbox provides additional details, including the drug's safety information and clinical trials. If the pill in question does not have an imprint, it may be a vitamin, herbal supplement, diet pill, or illegal or foreign drug, notes Drugs.com.
Individuals can email a physical description of a pill to the Division of Drug Information for free identification, according to the U.S. National Library of Medicine. Emergency pill identification warrants a call to the Poison Control Center, which is available at any time.