Answer
No. It works too slowly. Follow your prescribed angina action plan and use the rapid-acting medicine provided for attacks.
Sources for this answer
- Isosorbide Mononitrate Tablets 20 mg — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.