Answer
Yes. Excess exposure can cause hypercalcaemia, with symptoms including nausea, vomiting, thirst, frequent urination, confusion, weakness or an irregular heartbeat.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Desunin 4000IU — 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.