In this small study intravenous treatment with L-alanyl-L-glutamine of severe oral mucositis appears to be effective in a majority of cases although it is not as convenient as the povidone-iodine mouthwash treatment described in Lani's post above.
http://patient.cancerconsultants.com....aspx?id=37781
Intravenous Glutamine May Improve Oral Mucositis in Patients with Head and Neck Cancer