Fentanyl (sometimes called fentanil) is a synthetic opioid used as an analgesic (pain reliever). It also acts as a sedative. It has a short duration of action and a quick appearance. Indeed, it exists in two liquid and solid forms.

Mephedrone is a synthetic stimulant drug of the amphetamine and cathinone classes. It is chemically similar to thecathinone compounds found in the khat plant of eastern Africa

Oxycodone is a medicine that is used to treat pain. This kind of pain medicine is called an analgesic.

Diazepam, first marketed as Valium, is a drug in the benzodiazepine family that usually produces a calming effect.