What restriction applies to mixing the Aguettant Ltd Selenium 10 micrograms/ml infusion concentrate with other medicines?

The Aguettant Ltd Selenium 10 micrograms/ml infusion concentrate product must not be mixed with medicines except those mentioned in section 6.6; selenium is generally incompatible with high concentrations of ascorbic acid, which reduce selenite to insoluble elemental selenium unavailable as a nutritional selenium source.