Many new heroin users begin by snorting or smoking heroin in an attempt to avoid the social stigma attached to injection drug use.
The market for more diversified marijuana products with varying THC concentrations and even flavors has spurred a whole new type of synthetic marijuana product known as spice.
Psychotic symptoms that are consistent with methamphetamine may linger for months or years after someone who has been addicted to the drug stops using it.
Moderate doses of GHB may induce sleep and make the individual feel dizzy.