Memory tests of people who have taken Ecstasy as compared to non-drug users have shown that the Ecstasy users had lower scores.
Because of the painful physical and mental consequences of cocaine withdrawal, relapsing back into cocaine abuse is very common because the user feels that using cocaine to avoid withdrawal will work.
Valium specifically was detected in 26% of DUI cases in Sweden and its active metabolite nordazepam was detected in 28% of cases.
The duration of methamphetamine withdrawal symptoms can be anywhere from a day, weeks or even months for chronic methamphetamine users.