Glycopyrrolate is an anticholinergic medication commonly used to reduce excessive secretions, particularly in palliative care, postoperative settings, and certain neurologic conditions. It works by blocking acetylcholine at muscarinic receptors, which decreases salivary and respiratory secretions. Clinically, glycopyrrolate is often used to manage terminal respiratory secretions (“death rattle”).
Adverse effects of glycopyrrolate are primarily related to its anticholinergic properties. These may include dry mouth, constipation, urinary retention, blurred vision, tachycardia, and decreased sweating. While it has fewer central effects than agents like scopolamine, caution is still warranted in patients with glaucoma, gastrointestinal obstruction, or significant urinary retention risk. Monitoring hydration and bowel function is important, especially in elderly or frail patients.
Dosing strategies depend on the clinical need. In palliative care, low doses may be given subcutaneously or intravenously every 4–6 hours as needed, while oral dosing is common for chronic sialorrhea.
Clinicians should consider the patient’s overall medication burden, as cumulative anticholinergic load can worsen cognitive impairment and contribute to falls or constipation. I discuss drug interactions and other commonly used medications that may contribute to anticholinergic burden.
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