What is the composition of "Mucovitis cocktail" as used in the UZ van K. U. Leuven for the care of oral mucosa after radiotherapy?

Mucositis Cocktail has the following composition:

Hydrocortisone 200 mg Lidocaine 400 mg NILSTAT Suspension 1 Vial Suspension medium up to 500 ml

As a suspension medium, a celluosic mucus can be used (see the Galenic Formularium).