Answer
Some changes may appear earlier, but full antidepressant benefit commonly takes several weeks. Contact the prescriber if symptoms worsen or there are thoughts of self-harm.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Mirtazapine 15 mg orodispersible tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.