Answer
It is a rare condition in which haemoglobin carries oxygen less effectively. Blue or grey skin or lips, breathlessness, headache, confusion or unusual drowsiness require urgent assessment.
Sources for this answer
- EMLA Cream 5% — Current selected SmPCemc · Summary of Product Characteristics
- Fortacin 150 mg/ml + 50 mg/ml cutaneous spray, solution — 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.