Answer
Digoxin takes time to distribute from blood into tissues. Sampling too early can give a misleadingly high result.
Sources for this answer
- Digoxin 250 micrograms tablets — Current selected SmPCemc · Summary of Product Characteristics
- NHS Specialist Pharmacy ServiceNHS Specialist Pharmacy Service · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.