Inhalants known to cause severe irreversible hearing loss include spray paints, glues, dry cleaning chemicals and correction fluids.
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.
The cocaine intended for use in the United States is mainly produced in South American labs.
Undesirable side effects of LSD may decrease over time, and sometimes end within a few months of the last dose of the drug.