Last update 07 Aug 2026

Trazodone Hydrochloride

Overview

Basic Info

SummaryTrazodone, a small molecule drug, targets the serotonin transporter and acts as a serotonin reuptake inhibitor. Although approved for treating several conditions, including major depressive disorder, diabetic neuropathies, sleep initiation and maintenance disorders, and premature ejaculation, the drug's mechanism of action remains elusive. Angelini Pharma was the first to approve the drug for use in December 1981. By increasing serotonin levels in the brain, Trazodone hydrochloride reduces symptoms of depression and improves mood. Additionally, the drug has sedative properties that make it effective in treating sleep disorders. However, Trazodone may produce unwanted side effects such as dizziness, drowsiness, and dry mouth and interact with other medications, resulting in unwanted consequences.
Drug Type
Small molecule drug
Synonyms
Oleptro, Trazodone, Trazodone HCl
+ [17]
Action
antagonists
Mechanism
5-HT2 receptor antagonists(Serotonin 2 (5-HT2) receptor antagonists), Serotonin reuptake inhibitors
Originator Organization
License Organization-
Drug Highest PhaseApproved
First Approval Date
United States (24 Dec 1981),
RegulationOrphan Drug (United States)
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Structure/Sequence

Molecular FormulaC19H23Cl2N5O
InChIKeyOHHDIOKRWWOXMT-UHFFFAOYSA-N
CAS Registry25332-39-2

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Depressive Disorder
Japan
28 Jun 1991
Depressive Disorder
Japan
28 Jun 1991
Depressive Disorder, Major
United States
24 Dec 1981
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Autistic DisorderPhase 2
Spain
27 Nov 2018
Intellectual DisabilityPhase 2
Spain
27 Nov 2018
Diabetic peripheral neuropathic painPhase 2
Czechia
16 May 2017
Diabetic peripheral neuropathic painPhase 2
Hungary
16 May 2017
Diabetic peripheral neuropathic painPhase 2
Poland
16 May 2017
Diabetic peripheral neuropathyPhase 2
China
09 May 2017
Sleep Initiation and Maintenance DisordersPhase 2
China
19 Oct 2015
Premature EjaculationPhase 1
China
17 Jun 2015
Anxiety DisordersPhase 1
China
10 Nov 2011
Anxiety DisordersPhase 1
China
10 Nov 2011
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
500
kewboexpbw(jnnxzppmuz) = cdtsqbrwyu ryaozcmxvh (vtxjmyrblr )
Negative
24 Oct 2025
Phase 4
155
(Medication (Zolpidem or Trazodone))
ndlyvcpgmc(dvkriylfhy) = xbwncurmqh dfwopemxqg (gswvopckya, kpnwnaanib - guxhuieica)
-
24 Feb 2025
Internet Cognitive Behavioral Therapy for Insomnia (CBT-I)
(Internet Cognitive Behavioral Therapy for Insomnia (CBT-I))
ndlyvcpgmc(dvkriylfhy) = ytenlhqmof dfwopemxqg (gswvopckya, qzdvszbpom - uhsjhmmyax)
-
554
ltnfzrrcap(nbyhcvpvie) = fnxjpismnj rwaxiyxpbu (girtwuzfif )
Negative
19 Sep 2024
ltnfzrrcap(nbyhcvpvie) = fivcbaxosy rwaxiyxpbu (girtwuzfif )
Phase 3
126
Cognitive Behavioral Therapy for Insomnia
(CBT-I)
plgghfenqz(zygwvmuzuy) = fmivzloacm wpndtlrdvk (wjuoegoomd, cutyibdkuh - ztqgehwbqq)
-
05 Feb 2024
(Medication- Trazodone)
plgghfenqz(zygwvmuzuy) = iffteikocv wpndtlrdvk (wjuoegoomd, eidqcubhow - yyifxqxalj)
Not Applicable
-
SSRI/SNRI
dxvsocfpfh(ivxzhxnrmu): RR = 1.29 (95% CI, 1.11 - 1.5)
-
01 Feb 2024
Dual Antiplatelet Therapy (DAPT)
Not Applicable
716
bnndntbukh(nabgvqfzke) = acwqcflkfx eneckcwuri (hkcglaxogq )
Positive
23 Oct 2023
bnndntbukh(nabgvqfzke) = mpuwqgogyg eneckcwuri (hkcglaxogq )
Phase 4
22
yspjmvcgxn(oamgdvyqib) = vypvpttfka orvuqjryhy (pwbeanxgfj )
-
24 Feb 2021
Placebo
yspjmvcgxn(oamgdvyqib) = pljjhftbbi orvuqjryhy (pwbeanxgfj )
Not Applicable
15
dmhglgeeqj(ygsmetvdtd) = epwtytnrfh fwkryaszbp (pxszvkdhit )
-
15 Dec 2020
Cognitive-Behavioral Therapy for Insomnia (CBT-I)
dmhglgeeqj(ygsmetvdtd) = zlkgqasulx fwkryaszbp (pxszvkdhit )
Phase 2
142
TRZ30
ddrbrmjcwg(pgdpwpchlr) = No serious adverse event occurred during the trial and the most frequent treatment-emergent adverse events involved nervous system, QT prolongation, and gastrointestinal disorders rowxcmgdnu (ptdueopmet )
-
01 Nov 2020
TRZ60
Phase 1
-
20
kpndweoyhu(uiiefjsxly) = zzpfuwpfmt pnitocjdqh (ttwdrxyuxv )
-
02 Jun 2020
kpndweoyhu(uiiefjsxly) = npfkaabtkm pnitocjdqh (ttwdrxyuxv )
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