ChemicalBook > Product Catalog > API > Nervous system drugs > Antidepressants, Antimanics drugs > Trazodone
Trazodone Chemical Properties
- Melting point:86-870C
- Boiling point:528.5±60.0 °C(Predicted)
- Density 1.3141 (rough estimate)
- refractive index 1.5790 (estimate)
- pkapKa (50% ethanol): 6.14(at 25℃)
- CAS DataBase Reference19794-93-5(CAS DataBase Reference)
- NIST Chemistry ReferenceDesyrel(trazodone hcl salt)(19794-93-5)
- EPA Substance Registry System1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one, 2-[3-[4-(3-chlorophenyl)-1-piperazinyl]propyl]- (19794-93-5)
- RIDADR 3249
- HazardClass 6.1(b)
- PackingGroup III
Trazodone Usage And Synthesis
- Chemical PropertiesBrown Oil
- DefinitionChEBI: An N-arylpiperazine in which one nitrogen is substituted by a 3-chlorophenyl group, while the other is substituted by a 3-(3-oxo[1,2,4]triazolo[4,3-a]pyridin-2(3H)-yl)propyl group.
- IndicationsTrazodone (Apothecon) is also classified as an antidepressant
agent. It is a selective serotonin reuptake inhibitor
(SSRI), partial agonist at postsynaptic 5-HT1A
receptors, and exhibits α-adrenoceptor blocking actions.
Trazodone may cause priapism and enhance libido, and it prolongs nocturnal erections. This drug has been used both orally and by intracavernosal injection. It can be used alone or in combination with yohimbine. Overall, trazodone has not been as effective in treating ED as other available agents. However, it may be an option for selected patients, particularly those with performance anxiety or low libido.
- brand nameBeneficat;Bimaran;Deprax;Devidone;Manegan;Molipaxin;Pragmarel;Pragmazone;Taxagon;Thittico;Thombran;Thromban;Tombran;Tramensan;Tritico;Trittico.
- World Health Organization (WHO)Trazodone, an antidepressant indicated for the treatment of a wide range of depressive illness, was introduced in 1973. Although it is registered for use in many countries with highly evolved regulatory authorities, approval for registration was not granted in Norway because of a suspicion of carcinogenicity in a two-year rat study.
- Biological FunctionsTrazodone (Desyrel) was introduced in the early 1980s as a second-generation antidepressant. It blocks the neuronal reuptake of serotonin and is an antagonist at the 5HT2-receptor. Also, its major metabolite, mchlorophenylpiperazine (mCPP), is a postsynaptic serotonin receptor agonist. When compared to the TCAs, trazodone is relatively free of antimuscarinic side effects, but it does block the α-adrenoceptor. Common side effects include marked sedation, dizziness, orthostatic hypotension, and nausea. Priapism is an uncommon but serious side effect requiring surgical intervention in one-third of the cases reported. Because of trazodone’s sedating quality, it is often used in low doses to counter the insomnia associated with the newer antidepressants, such as the SSRIs.
- Mechanism of actionTrazodone acts as an antagonist at 5-HT2A receptors and is a weak inhibitor of 5-HT reuptake at the
presynaptic neuronal membrane, potentiating the synaptic effects of 5-HT. Its mechanism of action is
complicated by the presence of its metabolite, m-chlorophenylpiperazine, which is a 5-HT2C
agonist. At therapeutic dosages, trazodone does not appear to influence the reuptake of dopamine or NE
within the CNS. It has little anticholinergic activity and is relatively devoid of toxic cardiovascular effects. The
increase in serotonergic activity with long-term administration of trazodone decreases the number of
postsynaptic serotonergic (i.e., 5-HT2) and β-adrenergic binding sites in the brains of animals, decreasing the
sensitivity of adenylate (or adenylyl) cyclase to stimulation by β-adrenergic agonists. It has been suggested
that postsynaptic serotonergic receptor modification is mainly responsible for the antidepressant action
observed during long-term administration of trazodone. Trazodone does not inhibit MAO and, unlike
amphetamine-like drugs, does not stimulate the CNS.
Trazodone is rapidly and almost completely absorbed from the GItract following oral administration, with an oral bioavailability of approximately 65%. Peak plasma concentrations of trazodone occur approximately 1 hour after oral administration when taken on an empty stomach or 2 hours when taken with food. At steady state, its plasma concentrations exhibit wide interpatient variation.
Trazodone is extensively metabolized in the liver by N-dealkylation to its primary active metabolite, m-chlorophenylpiperazine (m-CPP), which subsequently undergoes aromatic hydroxylation to p-hydroxy-m-CPP. In vitro studies indicate that CYP3A4 is the major isoform involved in the production of m-CPP from trazodone (and CYP2D6 to a lesser extent). The p-hydroxy-m-CPP and oxotriazolopyridine-propionic acid (the major metabolite excreted in urine) are conjugated with glucuronic acid. Less than 1% of a dose is excreted unmetabolized.
- Clinical UseTrazodone is a phenylpiperazine–triazolopyridine antidepressant that is structurally unrelated to most of the other antidepressant classes.Trazodone is used primarily in the treatment of insomnia, mental depression, or depression/anxiety disorders. The drug also has shown some efficacy in the treatment of benzodiazepine or alcohol dependence, diabetic neuropathy, and panic disorders.
- Drug interactionsTrazodone possesses serotonergic activity; therefore, the possibility of developing 5-HT syndrome should be considered in patients who are receiving trazodone and other SSRIs or serotonergic drugs concurrently. When trazodone is used concurrently with drugs metabolized by CYP3A4, caution should be used to avoid excessive sedation. Trazodone can cause hypotension, including orthostatic hypotension and syncope; concomitant administration of antihypertensive therapy may require a reduction in dosage of the antihypertensive agent.
- DOXEPIN Citalopram NA Gabapentin 1-(3-Chlorophenyl)piperazine dihydrochloride TRAZODONE HYDROCHLORIDE USP29/EP5,TRAZODONE HYDROCHIORIDE,TRAZODONE HYDROCHLORIDE,TRAZODONE HCL P-430 Propyl gallate Propyl butyrate Triadimefon TRAZODONE HYDROCHLORIDE IMP. F (BP) AS HYDROCHLORIDE: 1-(3-CHLOROPHENYL)-4-(3-CHLOROPROPYL)PIPERAZINE HYDROCHLORIDE TRAZODONE HYDROCHLORIDE IMP. H (BP) AS DIHYDROCHLORIDE: 1,3-BIS-[4-(3-CHLOROPHENYL)PIPERAZIN-1-YL]PROPANE DIHYDROCHLORIDE 4’-Hydroxy Trazodone TRAZODONE HYDROCHLORIDE IMPURITY STANDARD NEFAZODONE , TRAZODONE Trazodone-D6 Hydrochloride Trazodone
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