LSD is listed as a Schedule I drug under the Controlled Substances Act.
The Food and Drug Administration has confirmed that Xanax should be considered to be habit forming.
Methadone is known to be one of the most difficult drugs to detox from, primarily due to the fact that the drug is stored in the body's fatty tissues.
Studies indicate that animals will self-administer anabolic steroids when they are given the opportunity, indicating that the use of anabolic steroids are reinforcing.