BACKGROUND: Gustatory sweating is a more common manifestation of diabetes mellitus than is appreciated. It is a distressing problem that has been difficult to treat safely. METHODS: Daily topical application of glycopyrrolate roll-on lotion was offered as an alternative to oral anticholinergic agents to an 87-year-old woman with long-standing type 2 diabetes mellitus who complained of profuse sweating after eating. RESULTS: Gustatory sweating was relieved by application of glycopyrrolate and reappeared when the glycopyrrolate was briefly withdrawn to confirm its therapeutic effect. CONCLUSION: For moderate to severe symptoms of diabetic gustatory sweating, topical application of glycopyrrolate is safe, effective, well tolerated, and convenient.
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Urman et al. (1999) studied this question.