glutamine
topical and systemic glutamine preparations have been studied for mucositis with inconsistent resolts. a more recent investigation used a proprirtatry transmucosal delivery system that enhances glutamine absorption. a prospectiveplacebo-controlled phase 3 patients with beast cancer treated with anthracycline-based chemotherapy showed a 22%reduction in high-grade mucositis. the FDA issued an approvable letter in october 2006 for oral mucositis and asked for an additional phase 3 trial before full approval evaluation. there are currently no published HN RT datato support the use of this agent.