Patients taking glycopyrrolate for biliary dyskinesia may experience side effects. Unless the common side effects persist or worsen the patient will not have to contact their physician, but if a patient experiences the serious side effects they should contact their physician immediately or seek emergency medical assistance. The common side effects of this medication include increased heartbeat, drowsiness, constipation, blurred vision, dry eyes, and dry mouth. The serious side effects include decreased interest in sex or sexual ability, fast/irregular heartbeat, difficulty starting urination, weakness, reduced heat tolerance, headache, reduced sweating ability, mood/mental changes, vomiting, nausea, loss of taste. In rare cases, an allergic reaction may occur and the signs are swelling, difficulty breathing, rash, itching, and severe dizziness. An allergic reaction is a medical emergency.