Someone using opiates for pain may say that they still feel the pain but that it doesn't bother them any longer.
The substances which currently have the highest levels of past year dependence or abuse among Americans are marijuana (4.5 million), pain relievers (1.9 million), and cocaine (1.0 million).
Prenatal exposure to crack often results in premature birth and crack babies tend to be smaller than other babies.
The rate of prescription drug emergency room visits has nearly doubled over the last five years in the U.S.