U. S. officials have said that the aging of the baby boom generation is resulting in a dramatic increase in levels of illicit drug use among adults 50 and older.

The increases may require the doubling of substance abuse treatment services needed for this population by 2020, said Pamela S. Hyde of the Substance Abuse and Mental Health Services Administration.

It is shown by the report, "Illicit Drug Use among Older Adults," that an estimated 4.3 million adults aged 50 or older, or 4.7 percent, used an illicit drug in the past year.

The report further said that less than 9 percent of men ages 50-54 had used marijuana in the past year, while 3.9 percent of women in this age group did.

Although marijuana use was more common than non-medical use of prescription drugs for adults age 50-59, among those ages 65 and older, non-medical use of prescription drugs was more common than marijuana.

Data collected (2006-08) by the Substance Abuse and Mental Health Services Administration's National Survey on Drug Use and Health was the main base of the report, which was collected from 19,921 adults age 50 and older. (With Input from Agencies)