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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Glycopyrrolate vs. atropine during anaesthesia for laryngoscopy and bronchoscopy.

As glycopyrrolate has been reported superior to atropine with respect to reduction of salivation, stability of cardiac rate and rhythm, and recovery, a comparison of these properties of the two drugs and placebo was made in 45 patients undergoing direct laryngoscopy and 45 patients undergoing bronchoscopy, in most cases followed by mediastinoscopy. When given i.m. 30 min before anesthesia (midazolam, alfentanil, thiopentone, and suxamethonium), the two test drugs were found to be equally potent regarding the antisialogogic effect. The same increase in heart rate after the test drugs was seen before induction, and during anaesthesia heart rate rose to the same level in the placebo group as the test groups. During anaesthesia, blood pressure was lowest in the atropine group. No differences could be demonstrated with respect to cardiac arrhythmias, possibly due to the small size of the material. The present study gives no reason for preferring either drug, and only the efficacy of both test drugs in controlling airway secretions provides an argument for using any anticholinergic drug when laryngoscopy or bronchoscopy is performed under the conditions of the present study.[1]


  1. Glycopyrrolate vs. atropine during anaesthesia for laryngoscopy and bronchoscopy. Grønnebech, H., Johansson, G., Smedebøl, M., Valentin, N. Acta anaesthesiologica Scandinavica. (1993) [Pubmed]
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