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Kappa agonists, Opioid receptor ligands, Drugs acting on the nervous system, Analgesic, Euphoriants

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Analgesics (22)
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morphine (64-31-3, 57-27-2)  
Morphia  ·  Morphine Sulfate  ·  MS Contin
Morphine is a pain medication of the opiate variety which is found naturally in a number of plants and animals. It acts directly on the central nervous system (CNS) to decrease the feeling of pain. It can be taken for both acute pain and chronic pain.
Levomethorphan (510-53-2, 125-71-3, 125-70-2)  
Dextromethorphan  ·  Dextromethorphan Hydrobromide  ·  Delsym
Methorphan comes in two isomeric forms, each with differing pharmacology and effects: Dextromethorphan - An over-the-counter cough suppressant, as well as dissociative hallucinogen. Levomethorphan - A potent opioid analgesic that was never clinically developed; the codeine analogue of the powerful opioid agonist analgesic levorphanol (Levo-Dromoran). Racemethorphan refers to the racemic mixture of both of these stereoisomers.
dextromethorphan (510-53-2, 125-71-3, 125-70-2)  
Dextromethorphan Hydrobromide  ·  Delsym  ·  Levomethorphan
Methorphan comes in two isomeric forms, each with differing pharmacology and effects: Dextromethorphan - An over-the-counter cough suppressant, as well as dissociative hallucinogen. Levomethorphan - A potent opioid analgesic that was never clinically developed; the codeine analogue of the powerful opioid agonist analgesic levorphanol (Levo-Dromoran). Racemethorphan refers to the racemic mixture of both of these stereoisomers.
meperidine (57-42-1)  
Demerol  ·  Dolin  ·  Pethidine
Pethidine, also known as meperidine and sold under the brand name Demerol among others, is a synthetic opioid pain medication of the phenylpiperidine class. Synthesized in 1939 as a potential anticholinergic agent by the German chemist Otto Eisleb, its analgesic properties were first recognized by Otto Schaumann while working for IG Farben, Germany. Pethidine is the prototype of a large family of analgesics including the pethidine 4-phenylpiperidines (piminodine, anileridine and others), the prodines (alphaprodine, MPPP, etc.), bemidones (ketobemidone, etc.) and others more distant, including diphenoxylate and analogues.
levorphanol (77-07-6, 297-90-5)  
Levorphanol Tartrate  ·  Levorphan  ·  LevoDromoran
Levorphanol (INN; brand name Levo-Dromoran) is an opioid medication used to treat moderate to severe pain. It is one of four enantiomers of the compound racemorphan, and was first described in Germany in 1948 as an orally active, morphine-like analgesic. The drug has been in clinical use in the United States since 1953.
Etorphine (14521-96-1)  
M99  ·  Ethorphine
levallorphan (152-02-3)  
Lorfan  ·  Naloxiphan
Levallorphan (INN, BAN) (brand names Lorfan, Naloxifan, Naloxiphan), also known as levallorphan tartrate (USAN), is an opioid modulator of the morphinan family used as an opioid analgesic and opioid antagonist/antidote. It acts as an antagonist of the μ-opioid receptor (MOR) and as an agonist of the κ-opioid receptor (KOR), and as a result, blocks the effects of stronger agents with greater intrinsic activity such as morphine whilst simultaneously producing analgesia. Levallorphan was formerly widely used in general anesthesia, mainly to reverse the respiratory depression produced by opioid analgesics and barbiturates used for induction of surgical anaesthesia whilst maintaining a degree of analgesia (via KOR agonism).
DEXTRORPHAN (297-90-5, 125-73-5)  
(+-)-17-Methylmorphinan-3-ol
Dextrorphan (DXO) is a psychoactive drug of the morphinan class which acts as an antitussive or cough suppressant and dissociative hallucinogen. It is the dextrorotatory-stereoisomer of racemorphan, the levo-half being levorphanol. Dextrorphan is produced by O-demethylation of dextromethorphan by CYP2D6.
norketamine (35211-10-0)  
Norketamine, or N-desmethylketamine, is the major active metabolite of ketamine, which is formed mainly by CYP3A4. Similarly to ketamine, norketamine acts as a noncompetitive NMDA receptor antagonist (Ki = 1.7 µM and 13 µM for (S)-(+)-norketamine and (R)-(–)-norketamine, respectively), but is about 3–5 times less potent as an anesthetic in comparison. Also, similarly again to ketamine, norketamine binds to the μ- and κ-opioid receptors.
PHENAZOCINE (127-35-5)  
Narphen  ·  Phenazocine Hydrobromide  ·  Phenbenzorphan
Phenazocine (brand names Prinadol, Narphen) is an opioid analgesic drug, which is related to pentazocine and has a similar profile of effects. Effects of phenazocine include analgesia and euphoria, also may include dysphoria and hallucinations at high doses, most likely due to action at κ-opioid and σ receptors. Phenazocine appears to be a much stronger analgesic with fewer side effects than pentazocine, probably due to a more favorable μ/κ binding ratio.
adrenorphin (88377-68-8)  
Adrenorphin, also sometimes referred to as metorphamide, is an endogenous, C-terminally amidated, opioid octapeptide (Tyr-Gly-Gly-Phe-Met-Arg-Arg-Val-NH2) that is produced from proteolytic cleavage of proenkephalin A and is widely distributed throughout the mammalian brain. It was named based on the fact that it was originally detected in human phaeochromocytoma tumour derived from the adrenal medulla, and was subsequently found in normal human and bovine adrenal medulla as well. Adrenorphin exhibits potent opioid activity, acting as a balanced μ- and κ-opioid receptor agonist while having no effects on δ-opioid receptors.
Hemorphin 4 (103930-64-9)  
Hemorphin-4 is an endogenous opioid peptide of the hemorphin family which possesses antinociceptive properties and is derived from the β-chain of hemoglobin in the bloodstream. It is a tetrapeptide with the amino acid sequence Tyr-Pro-Trp-Thr. Hemorphin-4 has affinities for the μ-, δ-, and κ-opioid receptors that are in the same range as the structurally related β-casomorphins, although affinity to the κ-opioid receptor is markedly higher in comparison.
Racemorphan (297-90-5)  
Racemorphan, or morphanol, is the racemic mixture of the two stereoisomers of 17-methylmorphinan-3-ol, each with differing pharmacology and effects: Dextrorphan - an antitussive and dissociative hallucinogen (NMDA receptor antagonist) Levorphanol - an opioid analgesic Racemorphan itself is under international control per the Single Convention on Narcotic Drugs 1961 and is therefore listed as a Schedule II Narcotic controlled substance in the US Controlled Substances Act 1970; it has an ACSCN of 9733 and in 2014 it had an aggregate annual manufacturing quota of zero. The salts in use are hydrobromide (free base conversion ratio 0.741), hydrochloride (0.876), and tartrate (0.632).
125-73-5 (125-73-5)  
Dextrorphan (DXO) is a psychoactive drug of the morphinan class which acts as an antitussive or cough suppressant and dissociative hallucinogen. It is the dextrorotatory-stereoisomer of racemorphan, the levo-half being levorphanol. Dextrorphan is produced by O-demethylation of dextromethorphan by CYP2D6.
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Kappa agonists
Opioid receptor ligands
Drugs acting on the nervous system
Analgesic
Euphoriants
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