The U.S. National Institute on Drug Abuse cites three types of drugs as frequently abused.

They are opioids, often prescribed for pain relief; depressants such as barbiturates; and stimulants that are used to treat sleep disorders or obesity. To prevent abuse:

-- Keep your doctor informed about all medications you are taking, including over-the-counter drugs.

-- Take your medications only as prescribed.

-- Read the information provided by your pharmacist before starting any medication.

-- Ask your doctor or pharmacist about a new medication, especially if you are unsure about its effects. (Health Day News)