Answer
A full blood count and antinuclear factor testing are recommended before and periodically during prolonged treatment, with additional assessment if lupus-like symptoms develop.
Sources for this answer
- Hydralazine 25 mg Tablets / Apresoline 25 mg 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.