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Nefazodone

Atypical Antidepressant · Antidepressant

Also known as SERZONE

Atypical AntidepressantAntidepressant
CDSCO approvedSchedule H
EXCRETION
not curated
INTERACTIONS
12 major
incl. contraindicated
PREGNANCY
not curated
Top interactionssee all 12
  • CilostazoleContraindicatedTextbookKDT 7e · p555
  • AbemaciclibSevereDatabaseDDInter
  • AcalabrutinibSevereDatabaseDDInter
  • AlfentanilSevereDatabaseDDInter

Mechanism

Nefazodone primarily exerts its effects through modulation of serotonin (5-HT) systems. It also functions as an inhibitor of cytochrome P450 enzymes, specifically CYP2B6 and CYP3A4.

Indications

Depressionanxiety disorders

Dosing

Adult
200–400 mg/day orally

Pharmacokinetics

Half-life
2-4 hours (parent), 1.5-4 hours (hydroxynefazodone metabolite)
Metabolism
Nefazodone inhibits CYP2B6 and CYP3A4 enzymes.

Side effects

Common
AgitationSeizuresSedationHypotension
Serious
  • GI Effects
  • liver failure (rare, resulted in voluntary withdrawal in several countries)
  • hepatotoxicity (black-box warning)
  • serotonin syndrome (with MAOIs)

Drug interactions

Cilostazole
Contraindicated
Textbook

Increased plasma levels and toxicity of cilostazole.

Should not be administered along with inhibitors of CYP3A4.

Source: KDT 7e · p555

Abemaciclib
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Acalabrutinib
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Alfentanil
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Alfuzosin
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Almotriptan
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Alprazolam
Severe
Database

Significantly increased alprazolam plasma concentrations, leading to enhanced sedative and psychomotor effects.

Avoid concomitant use. If co-administration is unavoidable, reduce alprazolam dose by 50-75% and monitor for increased sedation.

Source: DDInter

Amitriptyline
Severe
Database

Drug interaction classified as: synergy.

Source: DDInter

Amoxapine
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Artemether
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Astemizole
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Avanafil
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Related guidelines

Other Atypical Antidepressant drugs

Ask House about Nefazodone

Continue into a citation-backed clinical answer with the drug context already attached.

Sources: Goodman & Gilman 14e, Katzung, Harriet Lane·Verified: 2026-05-10 · House clinical team