Persons with HIV who consume alcohol and fail to take their medications or do not take them correctly, it increases the likelihood that the virus will become resistant to any form of therapy.
The number of current crack cocaine users in the U.S. in 2002 was about 567,000.
Opiate addicted individuals commonly experience bouts of euphoria followed by bouts of depression.
When combined, alcohol and tobacco drastically increase one's risk of becoming ill with certain cancers.