Glycopyrrate (also known as glycopyrronium) is a prescription anticholinergic medication that works by blocking the action of acetylcholine, a natural substance in the body. It is primarily used to reduce secretions like saliva and stomach acid.
Blocks muscarinic acetylcholine receptors, reducing secretions and smooth muscle activity.
Glycopyrrolate (Robinul):
Primary Medical Uses
Excessive Drooling (Sialorrhea): Used in children (ages 3–16) with neurological conditions like cerebral palsy or Parkinson’s to reduce chronic, severe drooling.
Stomach Ulcers: Often used as an adjunct treatment for peptic ulcers to help reduce stomach acid and abdominal pain.
Surgery: Administered before or during surgery to lessen mouth and throat secretions or to protect the heart and nervous system while under anesthesia:Pre-operative drying of secretions
COPD: Inhaled versions are used for long-term maintenance of airflow obstruction in chronic obstructive pulmonary disease (COPD) COPD (inhaled form — Seebri, Lonhala) — bronchodilation
Excessive Sweating (Hyperhidrosis): Topical and oral forms are used to treat primary axillary hyperhidrosis.
Glycopyrrolate Side Effects
Dry mouth, nose, and throat Blurred vision and sensitivity to light Constipation, nausea, or vomiting Drowsiness, dizziness, or confusion Decreased sweating, which can lead to overheating in hot weather Urinary retention Increased heart rate
Glaucoma: It can worsen certain types of glaucoma.
Should not be used with a blockage in the stomach, intestines, or bladder.
Dosage adjustments may be needed for those with kidney disease. Myasthenia Gravis: Generally contraindicated for individuals with this condition.
Key distinction from atropine: Glycopyrrolate is a quaternary ammonium compound, so it doesn’t cross the blood-brain barrier well — meaning fewer CNS side effects compared to atropine or scopolamine.
Forms available: Oral tablets, injectable (IV/IM), inhalation powder, and topical for sweating.