Some drugs that can cause unconsciousness:

Alcohol,

Antihistamines,

Barbiturates,

Benzodiazepines: alprazolam (Xanax), brotizolam, chlordiazepoxide (Librium), clobazam, clonazepam (Clonopin), clorazepate (Tranxene, Azene), diazepam (Valium), estazolam (ProSom), flunitrazepam,, flurazepam (Dalmane), halazepam (Paxepam), lorazepam (Atevan), midazolam (Hypnovel, Versed), nitrazepam, oxazepam (Serax), prazepam (Verstran), temazepam (Restoril), triazolam (Halcion).

Opiates (narcotics): alfentanil, alphaprodine (Nisentil), anileridine (Leritine), buprenorphine (Buprenex), butorphanol (Stadol), codeine, diphenoxylate (Lomotil), fentanyl (Sublimaze, Innovar), heroin, hydrocodone (Codone, Dicodid), hydromorphone (Dilaudid), levorphanol (Levorphan), loperamide (Imodium), meperidine (Demerol), meptazinol, methadone (Dolophine), methylfentanyl, morphine, nalbuphine (Nubain), naloxone (Narcan), naltrexone (Trexan), opium, oxycodone (Percodan, Percocet), oxymorphone (Numorphan), pentazocine (Talwin), oxymorphone, propoxyphene (Darvon), sufentanil.

Major tranquilizers: acetophenazine (Tindal), chlorpromazine (Thorazine), chlorprothixine (Taractane), clozapine (Leponex, Clozaril), ethopropazine (Parsidol), fluphenazine (Prolixin), haloperidol (Haldol), loxapine (Loxitane), mesoridazine (Serentil), molindone (Moban), perphenazine (Trilafon), prochlorperazine (Compazine), thioridazine (Mellaril), thiothixene (Navane), trifluoperazine (Stelazine), trifluopromazine (Vesprin), trimethobenzamide.

Muscle relaxants: baclofen (Lioresal), carisoprodol (Rela, Soma), chlormezanone (Trancopal), chlorphenesin (Maolate), chlorzoxazone (Paraflex), cyclobenzaprine (Flexeril), dantrolene (Dantrium), mephenesin, metaxalone (Skelaxin), methocarbamol (Robaxin, Delaxin).

Meprobamate (Miltown, Equanil).

Dextromethorphan,

Ethchlorvynol (Placidyl).