Definition: This block contains a wide variety of disorders that differ in severity and clinical form but that are all attributable to the use of one or more psychoactive substances, which may or may not have been medically prescribed. The third character of the code identifies the substance involved, and the fourth character specifies the clinical state. The codes should be used, as required, for each substance specified, but it should be noted that not all fourth character codes are applicable to all substances. Identification of the psychoactive substance should be based on as many sources of information as possible. These include self-report data, analysis of blood and other body fluids, characteristic physical and psychological symptom ...[+++]s, clinical signs and behaviour, and other evidence such as a drug being in the patient's possession or reports from informed third parties. Many drug users take more than one type of psychoactive substance. The main diagnosis should be classified, whenever possible, according to the substance or class of substances that has caused or contributed most to the presenting clinical syndrome. Other diagnoses should be coded when other psychoactive substances have been taken in intoxicating amounts (common fourth character .0) or to the extent of causing harm (common fourth character .1), dependence (common fourth character .2) or other disorders (common fourth character .3-.9). Only in cases in which patterns of psychoactive substance-taking are chaotic and indiscriminate, or in which the contributions of different psychoactive substances are inextricably mixed, should the diagnosis of disorders resulting from multiple drug use (F19.-) be used. | Modifiers The following fourth-character subdivisions are for use with categories F10-F19: Code Title .0 Acute intoxication A condition that follows the administration of a psychoactive substance resulting in disturbances in level of consciousness, cognition, perception, affect or behaviour, o ...

accidental overdose of drug, wrong drug given or taken in error, and drug taken inadvertently accidents in the use of drugs, medicaments and biological substances in medical and surgical procedures (self-inflicted) poisoning, when not specified whether accidental or with intent to harm. Follow legal rulings when available (see note at Y10-Y34).

Adverse effect of | Allergic reaction to | Hypersensitivity to | Idiosyncracy to | correct drug or medicament properly administered | Drug:hypersensitivity NOS | reaction NOS

agents primarily acting on smooth and skeletal muscles and the respiratory system anaesthetics (general)(local) drugs affecting the:cardiovascular system | gastrointestinal system | hormones and synthetic substitutes systemic and haematological agents systemic antibiotics and other anti-infectives therapeutic gases topical preparations vaccines water-balance agents and drugs affecting mineral and uric acid metabolism

Definition: This category should be used when two or more psychoactive substances are known to be involved, but it is impossible to assess which substance is contributing most to the disorders. It should also be used when the exact identity of some or even all the psychoactive substances being used is uncertain or unknown, since many multiple drug users themselves often do not know the details of what they are taking. | misuse of drugs NOS

An adverse of effect of a drug that is not due to an immunologic or metabolic abnormality or to alterations in bioavailability or excretion. Joint AAAAI/ACAAI practice parameters-Drug intolerance 2010.

Drug-induced bullous pemphigoid

Drug-induced autoimmune hemolytic anemia

Eruption caused by drug