When keeping a side effect diary, it's important to be thorough. Include the following details: - Date and Time: When the side effect occurred. - Description: A detailed account of the symptom. - Severity: Rate the intensity on a scale of 1 to 10. - Duration: How long the symptom lasted. - Triggers: Note any activities or foods that might have triggered the side effect. - Medications: Record any medications or interventions used to alleviate the symptom and their effectiveness.