Anticholinergic medicines

Anticholinergic medicines block the action of acetylcholine. Acetylcholine is a chemical messenger that helps cells talk to each other. It helps with memory, learning and concentration. Acetylcholine also helps control functions of the heart, blood vessels, airways, and urinary and digestive organs. When acetylcholine is blocked, it affects the regular functions of these organs. Anticholinergic medicines may be used to treat tremors, nausea and overactive bladder.

Anticholinergic medicines may have harmful side effects, especially in older adults. Side effects to watch for include:

• Confusion.
• Blurred vision.
• Constipation.
• Dry mouth.
• Lightheadedness.
• Loss of balance.
• Trouble urinating.

A medicine may have side effects because it interacts with another medicine, food, drinks, supplements or herbal products. Older people are twice as likely to have side effects from medicines. These effects also may be more severe in older adults.

Other factors that can affect medicine use may include nicotine use, caffeine, alcohol, your diet and any changes in your medical condition. Contact your healthcare professional if you experience any side effects.