The document outlines the detection times for various drugs in urine, ranging from as little as 1-6 hours for cocaine, ketamine, and propoxyphene, to 1-3 months for cannabis in heavy drug users. Most common drugs like amphetamines, cannabis, benzodiazepines, and ecstasy can be detected 1-3 days after use, while others including barbiturates, methadone, and tricyclic antidepressants may remain detectable for up to 2-10 days.