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Chapters ENES DE

XExtension Codes
Substances
XM6S30Medicaments
XM4G94Antidepressants
Other antidepressants

XM54Q7 category

Tryptophan

Also indexed as

Tryptophan

Nearby in Other antidepressants

XM03J9Bifemelane
XM03E6Bupropion
XM7U12Diclofensine
XM78C1Other specified antidepressant
XM0T46Mianserin
XM5QV7Minaprine
XM6X89Nomifensine
XM6AP8Oxitriptan

PreviousXM0B23 — Mirtazapine NextXM85H1 — Nefazodone

Browse ICD-11

01Certain infectious or parasitic diseases
02Neoplasms
03Diseases of the blood or blood-forming organs
04Diseases of the immune system
05Endocrine, nutritional or metabolic diseases
06Mental, behavioural or neurodevelopmental disorders
07Sleep-wake disorders
08Diseases of the nervous system
09Diseases of the visual system
10Diseases of the ear or mastoid process
11Diseases of the circulatory system
12Diseases of the respiratory system
13Diseases of the digestive system
14Diseases of the skin
15Diseases of the musculoskeletal system or connective tissue
16Diseases of the genitourinary system
17Conditions related to sexual health
18Pregnancy, childbirth or the puerperium
19Certain conditions originating in the perinatal period
20Developmental anomalies
21Symptoms, signs or clinical findings, not elsewhere classified
22Injury, poisoning or certain other consequences of external causes
23External causes of morbidity or mortality
24Factors influencing health status or contact with health services
25Codes for special purposes
26Supplementary Chapter Traditional Medicine Conditions
VSupplementary section for functioning assessment
XExtension Codes
Histopathology
Dimensions of injury
Dimensions of external causes
Consciousness
Substances
Diagnosis code descriptors
Capacity or context
Health Devices, Equipment and Supplies
Extension codes of particular relevance to skin diseases
5 more
XM6S30Medicaments
XM9N55Substances, chiefly nonmedicinal
Allergens
XM0QJ8Neuroprotective agents, not elsewhere classified
XM7BA9Analgesics, antipyretics or anti-inflammatory drugs
XM7452Antiepileptics or antiparkinsonism drugs
XM0HK5Antipsychotics [neuroleptics]
XM4G94Antidepressants
XM98Y0Cannabinoids or hallucinogens
XM9NV2Opioids
XM0RE9Psychostimulants
XM3L75Sedative hypnotic drugs or other central nervous system depressants
14 more
Monoamine oxidase-inhibitor, non-selective
Selective serotonin reuptake inhibitors
Serotonin-norepinephrine reuptake inhibitors
Other antidepressants
XM9KG1Non-selective monoamine reuptake inhibitors
XM1UL5Monoamine oxidase A inhibitors
XM6AP8Oxitriptan
XM4WM9Prazitone
XM0ST5Thiazesim
XM5DV5Tianeptine
XM5L45Viloxazine
XM62E7Trazodone
XM0B23Mirtazapine
XM54Q7Tryptophan
XM85H1Nefazodone
XM4ML8Oxaflozane
XM80H8Medifoxamine
XM4ZF1Pivagabine
XM70H2Reboxetine
XM5KP8Gepirone
XM5F11Agomelatine
12 more

International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).

Release 2026-01. View this entity in the official WHO ICD-11 browser.

This page reproduces WHO classification content for reference. It is not medical advice and must not be used to diagnose or treat. For coding decisions, consult the official release and your national coding guidelines.

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