The clandestine laboratories that produce analogues of fentanyl for illicit consumption often mix other drugs with fentanyl and sell it to consumers to make a quick buck.
One night of heavy alcohol consumption can impair one's ability to think abstractly for up to 30 days.
Most heroin sold on the street sell is in the form of a powder, which varies in color from white to dark brown because of additives and impurities.
The hydrocodone component in Lortab alone can cause an overdose, and is known to cause respiratory depression and other severe adverse reactions including heart failure, heart attack, pulmonary failure, liver or kidney failure, jaundice, amnesia, seizures, blackouts, and coma.