Stopped: formulation/dose changes; planned changes to safety monitoring/reporting
The purpose of this study is to determine if applying the drug phenylephrine to the inside of the mouth can be done safely and is tolerable to use in cancer patients receiving radiation to the Sub-mandibular lymph nodes.
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Safety: the presence or absence of mucosal or systemic toxicity related the the topical application of phenylephrine.
Timeframe: 24 months