How long do symptoms of methamphetamine withdrawal typically last? At what point should I worry?—RHODA L. WICKER, FNP, Wabash, Ind.

Severity and longevity of withdrawal symptoms vary greatly depending on the intensity and duration of drug use. Active withdrawal can range from 48 hours to four weeks, with symptoms declining during that time. Withdrawal duration, however, should not be confused with the occurrence of cravings. These can continue for up to a year or more.—Sherril Sego, FNP-C, DNP (147-3)