Answer
Do not add vitamin D, cod-liver oil or a vitamin D-containing multivitamin without checking with the clinical team, because the combined effect may raise calcium excessively.
Sources for this answer
- NHSNHS · NHS medicine guidance
- AlfaD 0.25 microgram capsules, soft. — 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.