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| Routes of administration | Oral |
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| Pharmacokinetic data | |
| Elimination half-life | 8-13 hours |
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| ChEMBL | |
| ECHA InfoCard | 100.040.974  |
| Chemical and physical data | |
| Formula | C16H24N2O4 |
| Molar mass | 308.378 g·mol−1 |
| 3D model (JSmol) | |
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Diacetolol is the primary metabolite of acebutolol. It is a beta blocker and anti-arrhythmic agent. [1]
Sulforidazine a typical antipsychotic and a metabolite of thioridazine; it and mesoridazine are more potent than the parent compound, whose pharmacological effects are believed by some to be largely due to its metabolism into sulforidazine and mesoridazine.
Butylone, also known as β-keto-N-methylbenzodioxolylbutanamine (βk-MBDB), is an entactogen, psychedelic, and stimulant psychoactive drug of the phenethylamine chemical class. It is the β-keto analogue of MBDB and the substituted methylenedioxyphenethylamine analogue of buphedrone.
Nordazepam is a 1,4-benzodiazepine derivative. Like other benzodiazepine derivatives, it has amnesic, anticonvulsant, anxiolytic, muscle relaxant, and sedative properties. However, it is used primarily in the treatment of anxiety disorders. It is an active metabolite of diazepam, chlordiazepoxide, clorazepate, prazepam, pinazepam, and medazepam.
Acebutolol, sold under the brand names Sectral among others, is a beta blocker for the treatment of hypertension and arrhythmias.
Paraxanthine, or 1,7-dimethylxanthine, is a dimethyl derivative of xanthine, structurally related to caffeine.
Adinazolam is a benzodiazepine derivative, and more specifically, a triazolobenzodiazepine (TBZD). It possesses anxiolytic, anticonvulsant, sedative, and antidepressant properties. Adinazolam was developed by Dr. Jackson B. Hester, who was seeking to enhance the antidepressant properties of alprazolam, which he also developed. Adinazolam was never FDA approved and never made available to the public market, however it has been sold as a designer drug.
Pinazepam is a benzodiazepine drug. It possesses anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties.
Ethyl loflazepate is a drug which is a benzodiazepine derivative. It possesses anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties. In animal studies it was found to have low toxicity, although in rats evidence of pulmonary phospholipidosis occurred with pulmonary foam cells developing with long-term use of very high doses. Its elimination half-life is 51–103 hours. Its mechanism of action is similar to other benzodiazepines. Ethyl loflazepate also produces an active metabolite which is stronger than the parent compound. Ethyl loflazepate was designed to be a prodrug for descarboxyloflazepate, its active metabolite. It is the active metabolite which is responsible for most of the pharmacological effects rather than ethyl loflazepate. The main metabolites of ethyl loflazepate are descarbethoxyloflazepate, loflazepate and 3-hydroxydescarbethoxyloflazepate. Accumulation of the active metabolites of ethyl loflazepate are not affected by those with kidney failure or impairment. The symptoms of an overdose of ethyl loflazepate include sleepiness, agitation and ataxia. Hypotonia may also occur in severe cases. These symptoms occur much more frequently and severely in children. Death from therapeutic maintenance doses of ethyl loflazepate taken for 2 – 3 weeks has been reported in 3 elderly patients. The cause of death was asphyxia due to benzodiazepine toxicity. High doses of the antidepressant fluvoxamine may potentiate the adverse effects of ethyl loflazepate.
Desmetramadol (INN), also known as O-desmethyltramadol (O-DSMT), is an opioid analgesic and the main active metabolite of tramadol. Tramadol is demethylated by the liver enzyme CYP2D6 in the same way as codeine, and so similarly to the variation in effects seen with codeine, individuals who have a less active form of CYP2D6 will tend to get reduced analgesic effects from tramadol. This also results in a ceiling effect which limits tramadol's range of therapeutic benefits to the treatment of moderate pain.
7-Hydroxyamoxapine is an active metabolite of amoxapine (Asendin). It contributes to amoxapine's pharmacology.
Gepefrine, also known as 3-hydroxyamphetamine, meta-hydroxyamphetamine, and α-methyl-meta-tyramine, is an antihypotensive or sympathomimetic agent of the amphetamine family that is marketed in certain European countries.
Fosazepam is a drug which is a benzodiazepine derivative; it is a water soluble derivative of diazepam. It has sedative and anxiolytic effects, and is a derivative of diazepam which has been substituted with a dimethylphosphoryl group to improve solubility in water.
An active metabolite is an active form of a drug after it has been processed by the body.
Eseroline is a drug which acts as an opioid agonist. It is a metabolite of the acetylcholinesterase inhibitor physostigmine but unlike physostigmine, the acetylcholinesterase inhibition produced by eseroline is weak and easily reversible, and it produces fairly potent analgesic effects mediated through the μ-opioid receptor. This mixture of activities gives eseroline an unusual pharmacological profile, although its uses are limited by side effects such as respiratory depression and neurotoxicity.
3-Methoxytyramine (3-MT), also known as 3-methoxy-4-hydroxyphenethylamine, is a human trace amine that occurs as a metabolite of the neurotransmitter dopamine. It is formed by the introduction of a methyl group to dopamine by the enzyme catechol-O-methyl transferase (COMT). 3-MT can be further metabolized by the enzyme monoamine oxidase (MAO) to form homovanillic acid (HVA), which is then typically excreted in the urine.
Norpropoxyphene is a major metabolite of the opioid analgesic drug dextropropoxyphene, and is responsible for many of the side effects associated with use of this drug, especially the unusual toxicity seen during dextropropoxyphene overdose. It has weaker analgesic effects than dextropropoxyphene itself, but is a relatively potent pro-convulsant and blocker of sodium and potassium channels, particularly in heart tissue, which produces prolonged intracardiac conduction time and can lead to heart failure following even relatively minor overdoses. The toxicity of this metabolite makes dextropropoxyphene up to 10 times more likely to cause death following overdose compared to other similar mild opioid analgesics, and has led to dextropropoxyphene being withdrawn from the market in some countries.
α-Methyldopamine (α-Me-DA), also known as 3,4-dihydroxyamphetamine, is a research chemical of the catecholamine and amphetamine chemical classes. Its bis-glutathionyl metabolite is slightly neurotoxic when directly injected into the brain's ventricles.
Pseudophenmetrazine is a psychostimulant compound of the morpholine class. It is the N-demethylated and cis-configured analogue of phendimetrazine as well as the cis-configured stereoisomer of phenmetrazine. In addition, along with phenmetrazine, it is believed to be one of the active metabolites of phendimetrazine, which itself is inactive and behaves merely as a prodrug. Relative to phenmetrazine, pseudophenmetrazine is of fairly low potency, acting as a modest releasing agent of norepinephrine (EC50 = 514 nM), while its (+)-enantiomer is a weak releaser of dopamine (EC50 = 1,457 nM) whereas its (−)-enantiomer is a weak reuptake inhibitor of dopamine (Ki = 2,691 nM); together as a racemic mixture with the two enantiomers combined, pseudophenmetrazine behaves overall more as a dopamine reuptake inhibitor (Ki = 2,630 nM), possibly due to the (+)-enantiomer blocking the uptake of the (−)-enantiomer into dopaminergic neurons and thus preventing it from inducing dopamine release. Neither enantiomer has any significant effect on serotonin reuptake or release (both Ki = >10,000 nM and EC50 = >10,000 nM, respectively).
4-Hydroxy-3-methoxymethamphetamine (HMMA) is an active metabolite of 3,4-methylenedioxymethamphetamine (MDMA). It is a slightly more potent stimulant than MDMA.
15β-Hydroxycyproterone acetate (15β-OH-CPA) is a steroidal antiandrogen and the major metabolite of cyproterone acetate (CPA). It is formed from CPA in the liver by hydroxylation via the cytochrome P450 enzyme CYP3A4. During therapy with CPA, 15β-OH-CPA circulates at concentrations that are approximately twice those of CPA. 15β-OH-CPA has similar or even greater antiandrogen activity compared to CPA. However, it has only about one-tenth of the activity of CPA as a progestogen. 15β-OH-CPA also shows some glucocorticoid activity, similarly to CPA and unesterified cyproterone.
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