Glycopyrrolate and Oxybutynin interaction
Glycopyrrolate and Oxybutynin: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Glycopyrrolate label · effective 2026-02-17
• Other Conditions Exacerbated by Anticholinergic Adverse Reactions : Use is not recommended in patients with autonomic neuropathy, hyperthyroidism, cardiac disease, hiatal hernia, etc.
Concomitant use of glycopyrrolate and other anticholinergics or other medications that decrease GI peristalsis is not recommended [ see Drug Interactions (7.2) ].
• Other Anticholinergic Drugs : Concomitant use is not recommended.
Glycopyrrolate are not recommended in patients taking other anticholinergic drugs [ see Warnings and Precautions (5.3 , 5.4 , 5.6 ) ].
The risk of gastrointestinal adverse reactions is further increased with the use of other anticholinergics and other medications that decrease gastrointestinal peristalsis.
From the Oxybutynin (Oxybutynin Chloride Extended Release) label · effective 2026-01-14
Oxybutynin chloride extended-release tablets, like other anticholinergic drugs, may decrease gastrointestinal motility and should be used with caution in patients with conditions such as ulcerative colitis and intestinal atony.
The concomitant use of oxybutynin with other anticholinergic drugs or with other agents which produce dry mouth, constipation, somnolence (drowsiness), and/or other anticholinergic-like effects may increase the frequency and/or severity of such effects.
Co-administration with other anticholinergic drugs may increase the frequency and/or severity of anticholinergic-like effects.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.