Someone using opiates for pain may say that they still feel the pain but that it doesn't bother them any longer.
Alcohol withdrawal should be undergone at an inpatient drug treatment facility where the individual can be given fluids or medications through an IV.
The recent high rates of marijuana use among individuals in the U.S. may be attributed in part to the increasing number of states which have approved its use for medical purposes.
Studies indicate that tolerance and dependence develop at a similar rate with both heroin and Opana use.