I didn't realise that I had taken so many mind-altering substances!
Opiates - My Favourite
Morphine (PO/IV/IM)
Fentanyl (IV/Trans-dermal))
Diamorphine (IM)
Oxycodone (PO/Inh)
Buprenorphine (PO/Inh)
Tramadol (PO/IV/IM)
Codeine (PO)
Stimulants
Amphetamine (PO/Inh)
Cocaine (Inh)
Methylphenidate (PO/Inh)
Ephedrine (PO)
Anaesthetics
Ketamine (IV/IM)
Nitrous oxide (Inh)
Propofol (IV) - Yes, self-administered!
Etomidate (IV) - Again, self-administered!
Thiopentone - UK (Sodium Pentothal - US) (IV) - You guessed it, self-administered!
Minor-tranquilisers/benzos
Diazepam (PO/IV/PR)
Lorazepam (PO/IV/IM)
Midazolam (PO/IV/IM/PR)
Clonazepam (PO)
Alprazolam (PO)
Chlordiazepoxide (PO)
Nitrazepam (PO)
Zopiclone (PO)
Zolpidem (PO)
Otherl
Pregabalin (PO)
Gabapentin (PO)
Baclofen (PO)
Cyclizine (PO/IV/IM) - Synergistic with opioids.
Dextromethorphan (PO)
Carisopradol (PO)
Kratom (PO)
Promethazine (PO)
Cannabis (PO/Inh)
Anti-depressants (All PO)
Paroxetine
Fluoxetine
Venlafaxine
Reboxetine
Bupropion
Lamotrigine (I know it's not strictly an anti-depressant, however in the Euroean Union it is often used to augment other anti-depressants)
Major-tranquilisers/atypicals (I know they are not recreational, however they are still mind-altering to an extent)
Olanzapine (PO)
Aripiprazole (PO)
Key
PO - Oral, IV - Intravenous, IM - Intra-muscular, Inh - Inhaled/insufflated/snorted, PR - rectal.