Data on the pharmacokinetic profile of the 1% glycopyrronium bromide cream for a time period beyond 2 weeks are important: Reply from authors.

Gregoriou et al ask for systemic PK data beyond 2 weeks following the topical application of glycopyrronium bromide (GPB) containing cream for treatment of primary axillary hyperhidrosis referring to another recently approved glycopyrronium tosylate (GPT) containing topical product.