Studies have shown that the majority of Americans who misuse prescription psychotherapeutic drugs also engage in other illicit drug use as well.
Repeated and chronic heroin users who fail to use sterile needles or share equipment may experience infection of the heart lining and valves, normally due to lack of sterile technique.
Use of PCP can result in addiction and dependency, and its repeated use can lead to craving and compulsive PCP-seeking behavior, despite severe adverse consequences.
Opiate addicted individuals commonly experience an increase in body temperature, a rush of euphoria, a heavy feeling in the limbs and dry mouth.