> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metriport.com/llms.txt
> Use this file to discover all available pages before exploring further.

# MedicinalProductUndesirableEffect

> Describe the undesirable effects of the medicinal product.

## Properties

| Name                   | Required | Type                                                                                                                                   | Description                                    |
| ---------------------- | -------- | -------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------- |
| subject                | No       | Reference\<[MedicinalProduct](/medical-api/fhir/resources/medicinalproduct) / [Medication](/medical-api/fhir/resources/medication)>\[] | The medication for which this is an indication |
| symptomConditionEffect | No       | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)                                                                        | The symptom, condition or undesirable effect   |
| classification         | No       | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)                                                                        | Classification of the effect                   |
| frequencyOfOccurrence  | No       | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)                                                                        | The frequency of occurrence of the effect      |
| population             | No       | [Population](/medical-api/fhir/data-types/population)\[]                                                                               | The population group to which this applies     |

## Search Parameters

| Name    | Type      | Description                                            | Expression                                |
| ------- | --------- | ------------------------------------------------------ | ----------------------------------------- |
| subject | reference | The medication for which this is an undesirable effect | MedicinalProductUndesirableEffect.subject |

## Inherited Properties

| Name              | Required | Type                                                   | Description                                            |
| ----------------- | -------- | ------------------------------------------------------ | ------------------------------------------------------ |
| id                | No       | string                                                 | Logical id of this artifact                            |
| meta              | No       | [Meta](/medical-api/fhir/data-types/meta)              | Metadata about the resource                            |
| implicitRules     | No       | uri                                                    | A set of rules under which this content was created    |
| language          | No       | code                                                   | Language of the resource content                       |
| text              | No       | [Narrative](/medical-api/fhir/data-types/narrative)    | Text summary of the resource, for human interpretation |
| contained         | No       | Resource\[]                                            | Contained, inline Resources                            |
| extension         | No       | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations          |
| modifierExtension | No       | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored                      |

To view the FHIR specification for this resource, see [MedicinalProductUndesirableEffect](https://www.hl7.org/fhir/StructureDefinition/MedicinalProductUndesirableEffect).