Answer
Yes. Penicillins can alter certain laboratory-test results. Tell the laboratory or treating clinician about recent treatment.
Sources for this answer
- Benzylpenicillin benzathine 2.4 Million I.U. powder for suspension for injection — 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.