Methylone (3, 4-Methylenedioxy-N-methylcathinone), a β-keto analog of 3,4-methylenedioxy-N-methylamphetamine (MDMA) is a stimulant and psychoactive drug. Methylone is a popular drug of abuse that strongly increases the release of the three monoamines: dopamine, serotonin (5-HT) and norepinephrine. In addition, methylone inhibits plasma membrane catecholamine transporters but only weakly inhibit the vesicle transporter. In April 2013, methylone was listed in the Schedule 1 substance under the Controlled Substances Act.

Bufotenine is a hallucinogenic serotonin analog found in frog and toad skins, mushrooms, plants and some mammals (especially in the brains, plasma, and urine of schizophrenics). It

4-Piperidinol, 1-phenethyl-4-phenyl acetate (PEPAP) is a synthetic opioid discovered by Janssen in 1960. PEPAP is an analog of meperidine, it is abused and illegally sold on streets as a "synthetic heroin".

Dicazepam (known as Ro5-3448, chlorodiazepam and 2'-chloro-diazepam) is a 2’-chloro derivative of diazepam that has emerged as a designer drug and is intended for forensic and research applications. It is metabolized in vivo into the pharmacologically active which can be detected in urine.