Answer
Benefits are not immediate. Some change may occur within the first few weeks, but the full effect can take longer. Seek prescriber review if symptoms worsen or improvement is not emerging as expected.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Vensir XL/Venlafaxine 150mg prolonged release hard capsules — 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.