Male hashish users can have lower sperm count and females may have irregular periods.
The most typical marijuana users among high school aged youth in the U.S. are 11th and 12th graders.
Research indicates that current drug rehabs can be as effective for older adults as they are for younger adults.
The psychological effects which result from Ecstasy use can be problematic for users, and can symptoms such as depression which can linger for weeks and months.