Answer
Alcohol can strengthen the blood-pressure-lowering effect and increase dizziness, faintness or sleepiness. Product information for the prolonged-release tablet advises avoiding alcohol.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Isoket Retard 20 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.