Prescription central nervous system depressants slow down brain function, and if combined with other medications that cause drowsiness or with alcohol, heart rate and respiration can slow down dangerously.
The specific type of drug rehab or combination of treatments that addicted persons requires may vary, depending on their particular needs and, often, on the types of drugs they use.
Studies indicate that PCP use may impede the learning process in teenagers.
Methamphetamine overdose can result in hypothermia and convulsions, which if not treated may be life threatening.