Answer
Stop it and seek prompt medical assessment. Do not restart unless a specialist has reviewed the reaction.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Allopurinol Tablets BP 100mg — Current selected SmPCemc · Summary of Product Characteristics
- Allopurinol 100mg — 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.