Mucositis cocktail: Lidocaine base or Lidocaine HCl?

When asked what is the formula of the Mucositis cocktail of the UZLeuven, give you the answer: Mucositis Cocktail has the following composition: Hydrocortisone 200 mg Lidocaine 400 mg NILSTAT Suspension 1 Vial Suspension medium up to 500 ml But doesn't it work better with lidocaine HCl?