Answer
Yes. Excessive exposure can cause selenosis, with garlic-smelling breath, digestive symptoms, tiredness, and later hair, nail or nerve changes.
Sources for this answer
- Selenase 500 micrograms, oral solution (50 micrograms/ml) — Current selected SmPCemc · Summary of Product Characteristics
- Selenase 100 micrograms, 500 micrograms solution for injection (50 micrograms/ml) — Current selected SmPCemc · Summary of Product Characteristics