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

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Analgesics (6)
Opioids (6)
Psychoactive drugs (6)
Dissociative drugs (3)
Pharmaceuticals (3)
Semisynthetic opioids (3)
Alcohols (2)
Synthetic opioids (2)
Alkenes (1)
Allyl compounds (1)
Cyclic compounds (1)
Cycloalkenes (1)
Cyclohexenes (1)
Ethers (1)
Euphoriants (1)
Mu-opioid agonists (1)
Six-membered rings (1)

Nalorphine (62-67-9)  
Allylnormorphine  ·  Nalorphine Hydrochloride  ·  Lethidrone
Nalorphine (INN) (brand names Lethidrone, Nalline), also known as N-allylnormorphine, is a mixed opioid agonist–antagonist with opioid antagonist and analgesic properties. It was introduced in 1954 and was used as an antidote to reverse opioid overdose and in a challenge test to determine opioid dependence. It acts at two opioid receptors — the μ-opioid receptor (MOR) where it has antagonistic effects, and at the κ-opioid receptor (KOR) (Ki = 1.6 nM; EC50 = 483 nM; Emax = 95%) where it exerts high-efficacy partial agonist/near-full agonist characteristics.
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).
Diprenorphine (14357-78-9)  
Revivon  ·  Diprenorphine Hydrochloride
Diprenorphine (brand name Revivon; former developmental code name M5050), also known as diprenorfin, is a non-selective, high-affinity, weak partial agonist of the μ- (MOR), κ- (KOR), and δ-opioid receptor (DOR) (with equal affinity) that is employed in veterinary medicine as an opioid antagonist. It is used to reverse the effects of super-potent opioid analgesics such as etorphine and carfentanil that are used for tranquilizing large animals. The drug is not approved for use in humans.
Oxilorphan (42281-59-4)  
oxilorphan hydrochloride, (9alpha,13alpha,14alpha)-isomer  ·  oxilorphan, (14alpha)-(+-)-isomer  ·  L-N-cyclopropylmethyl-3,14-dihydroxymorphinan
Oxilorphan (INN, USAN) (developmental code name L-BC-2605) is an opioid antagonist of the morphinan family that was never marketed. It acts as a μ-opioid receptor (MOR) antagonist but a κ-opioid receptor (KOR) partial agonist, and has similar effects to naloxone and around the same potency as an MOR antagonist. Oxilorphan has some weak partial agonist actions at the MOR (with miosis, nausea, dizziness, and some euphoria observed) and can produce hallucinogenic/dissociative effects at sufficient doses, indicative of KOR activation.
56195-50-7 (56195-50-7)  
nalodeine  ·  N-allylnorcodeine  ·  nalodeine hydrobromide, (5alpha,6alpha)-isomer
Nalodeine, also known more commonly as N-allylnorcodeine, is an opioid antagonist (specifically, an antagonist of the μ-opioid receptor) that was never marketed but is of notability in having been the first opioid antagonist to have been discovered. It was first reported in 1915, and this was followed by the clinical introduction of nalorphine (N-allylnormorphine) in 1954, naloxone (N-allyloxymorphone) in 1960, and naltrexone (N-methylcyclopropyloxymorphone) in 1963. Nalmefene (6-desoxy-6-methylene-naltrexone), another structurally related opioid antagonist derivative, was also subsequently introduced, in 1996.

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Bremazocine (83829-76-9, 75684-07-0, 79665-42-2)  
bremazocine hydrochloride, (2R)-isomer  ·  bremazocine hydrochloride, (+-)-isomer  ·  2-(1-hydroxy-cyclopropylmethyl)-5-ethyl-9,9-dimethyl-2'-hydroxy-6,7-benzomorphan
Bremazocine is a κ-opioid receptor agonist related to pentazocine. It has potent and long-lasting analgesic and diuretic effects. It has 200 times the activity of morphine, but appears to have no addictive properties and does not depress breathing.
Naloxone hydrochloride (357-08-4)  
Naloxone  ·  Narcan  ·  Nalone
Naloxone, sold under the brandname Narcan among others, is a medication used to block the effects of opioids, especially in overdose. Naloxone may be combined within the same pill as an opioid to decrease the risk of misuse. When given intravenously, naloxone works within two minutes, and when injected into a muscle, it works within five minutes; it may also be sprayed into the nose.
naloxone (465-65-6)  
Narcan  ·  Naloxone Hydrochloride  ·  Nalone
Naloxone, sold under the brandname Narcan among others, is a medication used to block the effects of opioids, especially in overdose. Naloxone may be combined within the same pill as an opioid to decrease the risk of misuse. When given intravenously, naloxone works within two minutes, and when injected into a muscle, it works within five minutes; it may also be sprayed into the nose.
Nikethamide (59-26-7)  
Coramine  ·  Coramin  ·  Cordiamine
Nikethamide is a stimulant which mainly affects the respiratory cycle. Widely known by its former trade name of Coramine, it was used in the mid-twentieth century as a medical countermeasure against tranquilizer overdoses, before the advent of endotracheal intubation and positive-pressure lung expansion. It is no longer commonly considered to be of value for such purposes.
Etorphine (14521-96-1)  
M99  ·  Ethorphine
Nalorphine (62-67-9)  
Allylnormorphine  ·  Nalorphine Hydrochloride  ·  Lethidrone
Nalorphine (INN) (brand names Lethidrone, Nalline), also known as N-allylnormorphine, is a mixed opioid agonist–antagonist with opioid antagonist and analgesic properties. It was introduced in 1954 and was used as an antidote to reverse opioid overdose and in a challenge test to determine opioid dependence. It acts at two opioid receptors — the μ-opioid receptor (MOR) where it has antagonistic effects, and at the κ-opioid receptor (KOR) (Ki = 1.6 nM; EC50 = 483 nM; Emax = 95%) where it exerts high-efficacy partial agonist/near-full agonist characteristics.
Nalorphine hydrochloride (57-29-4)  
Nalorphine  ·  Allylnormorphine  ·  Lethidrone
Spiroxatrine (1054-88-2)  
Spiroxatrine is a drug which acts as a selective antagonist at both the 5-HT1A receptor and the α2C adrenergic receptor. It is an analog of spiperone and also has some dopamine antagonist effects.
baclofen (62594-36-9, 1134-47-0)  
Lioresal  ·  Genpharm  ·  beta-(p-Chlorophenyl)-gamma-aminobutyric Acid
Baclofen, sold under the brand name Lioresal among others, is a medication used to treat spasticity. It is used as a central nervous system depressant and skeletal muscle relaxant although its effectiveness has not been clearly shown. It is also used in topical creams to help with pain.
Diprenorphine (14357-78-9)  
Revivon  ·  Diprenorphine Hydrochloride
Diprenorphine (brand name Revivon; former developmental code name M5050), also known as diprenorfin, is a non-selective, high-affinity, weak partial agonist of the μ- (MOR), κ- (KOR), and δ-opioid receptor (DOR) (with equal affinity) that is employed in veterinary medicine as an opioid antagonist. It is used to reverse the effects of super-potent opioid analgesics such as etorphine and carfentanil that are used for tranquilizing large animals. The drug is not approved for use in humans.
Pravadoline (92623-83-1)  
Pravadoline (WIN 48,098) is an antiinflammatory and analgesic drug with an IC50 of 4.9 µM and a Ki of 2511 nM at CB1, related in structure to nonsteroidal anti-inflammtory drugs (NSAIDs) such as indometacin. It was developed in the 1980s as a new antiinflammatory and prostaglandin synthesis inhibitor, acting through inhibition of the enzyme cyclooxygenase (COX). However, pravadoline was found to exhibit unexpectedly strong analgesic effects, which appeared at doses ten times smaller than the effective anti-inflammatory dose and so could not be explained by its action as a COX inhibitor.
SPIRADOLINE (87151-85-7)  
Spiradoline (U-62066) is a drug which acts as a highly selective κ-opioid agonist. It has analgesic, diuretic and antitussive effects, and produces subjective effects in animals similar to those of ketazocine and alazocine. The main effect in humans is sedation, along with analgesic and diuretic effects, but significant side effects such as dysphoria and hallucinations have stopped it from being used clinically.
15532-75-9 (15532-75-9)  
TFMPP  ·  1-(m-trifluoromethylphenyl)piperazine  ·  1-(3-trifluoromethylphenyl)piperazine
3-Trifluoromethylphenylpiperazine (TFMPP) is a recreational drug of the piperazine chemical class. Usually in combination with its analogue benzylpiperazine (BZP), it is sold as an alternative to the illicit drug MDMA ("Ecstasy") under the name "Legal X".
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Kappa agonists
Opioid receptor ligands
Drugs acting on the nervous system
Analgesic
Opioid antagonists
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