Library pagoclone An anxiolytic drug related to zopiclone with no sedative or hypnotic qualities. Has been investigated as a possible alcohol replacement. Re…

Library parafluorofentanyl Parafluorofentanyl is an extremely potent synthetic opioid and analogue of fentanyl, originally developed by Janssen Pharmaceutica during t…

Library pentazocine A synthetic opioid used as an analgesic. It is only used IM and IV in the medical field and has respiratory depressant effects. It is pregn…

Library pentobarbital Pentobarbital, also known as pentobarbitone in British English and by the brand name Nembutal, is a short-acting psychoactive drug of the b…

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Library pentobarbitalisomer

Library pethidine Pethidine is significantly less safe than other opioids due to its toxic metabolite norpethidine, which accumulates with repeated dosing an…

Library phenazepam Phenazepam is a benzodiazepine first developed in the Soviet Union in 1975. It is prescribed in Russia and other countries for psychiatric…

Library phenibut Phenibut is a depressant and anxiolytic of the gabapentinoid class, structurally derived from the neurotransmitter GABA. Developed in the S…

Library phenobarbital Phenobarbital, also known as phenobarbitone in British English and by the brand name Luminal, is a long-acting psychoactive drug of the bar…

Library phenomorphan Phenomorphan is an opioid analgesic. It is not currently used in medicine, but has similar side-effects to other opiates, which include itc…

Library pholcodeine Pholcodine is an opioid cough suppressant (antitussive). It helps suppress unproductive coughs and also has a mild sedative effect, but has…

Library picamilon An analogue of GABA that does pass the brain blood barrier, which is then hydrolyzed into GABA and Niacin. In which the GABA could produce…

Library pinazepam Benzodiazepine that is solely an anxiolytic drug that lacks the hypnotic and motor impairment that most benzodiazepines do. The main metabo…

Library pindolol Pindolol, sold under the brand name Visken among others, is a non-selective beta blocker which is used in the treatment of hypertension. It…

Library piracetam Piracetam is a nootropic substance of the racetam class and a cyclic derivative of the neurotransmitter GABA. First synthesized in 1964 by…

Library pivoxazepam Pivoxazepam is a drug which is a benzodiazepine derivative. It is the pivalate (2,2-dimethylpropanoate) ester of oxazepam. It has sedative…

Library prazepam Prazepam is a long-acting benzodiazepine prodrug that metabolizes into desmethyldiazepam (nordazepam), which has a very long half-life and…

Library pregabalin Pregabalin is a depressant and anxiolytic substance of the gabapentinoid class, structurally related to GABA. First synthesized in 1990 and…

Library primidone Primidone, sold under various brand names, is a barbiturate medication that is used to treat partial and generalized seizures and essential…

Library progesterone Pregn-4-ene-3,20-dione, also known as Progesterone or P4 is a steroid sex hormone of the progestogen class. It occurs naturally and is the…