Illicit drug use is more common in older people than ever before - but that's because they did it the most when they were younger and they are more likely than ever to survive into old age.New research published in Age and Ageing found that the lifetime use of cannabis, amphetamine, cocaine and LSD in 50-64 year olds has significantly increased since 1993 and is much higher than lifetime use in adults aged over 65. read more