Answer
Caffeine blocks adenosine receptors and can weaken the coronary vasodilation needed for an accurate test. Follow the caffeine-free period specified by your appointment team.
Sources for this answer
- Rapiscan 400 microgram solution for injection — 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.