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What Is a Cholinergic Drug?

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  • Written By: Marlene Garcia
  • Edited By: Daniel Lindley
  • Last Modified Date: 09 November 2016
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    2003-2016
    Conjecture Corporation
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A cholinergic drug is an acetylcholine agonist that stimulates the parasympathetic nervous system and mimics a hormone found naturally in the body. This hormone controls digestion and muscle strength. Certain cholinergic drug formulas allow the stomach to produce more acid, while also producing more tears and saliva. They are also used to treat muscle weakness, glaucoma, and Alzheimer’s disease.

Acetylcholine hormones aid in the release of enzymes that permit proper digestion of food and normal functioning of smooth muscles. A patient who experiences dysfunction from disease commonly uses a cholinergic drug, which blocks the production of enzymes or allows them to last longer, depending on dosage. This drug is routinely used to treat myasthenia gravis, a condition marked by weak muscles.

Myasthenia gravis represents a progressive disease caused by an autoimmune disorder. The body attacks acetylcholine receptors in the parasympathetic nervous system, blocking them from regulating muscle strength. Doctors typically prescribe a cholinergic drug to increase muscle tone and permit a patient to build stronger muscles.

Other forms of the medication treat glaucoma by reducing pressure in the eye. Eye drops of this cholinergic drug are generally used by glaucoma patients. If pressure in the eye persists, it might harm optic nerves and lead to loss of vision.

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A cholinergic drug typically helps stimulate bowel and bladder action in patients after surgery. It prevents the retention of urine and counteracts other drugs used as muscle relaxants during surgical procedures. Its use is considered quite common during surgery.

One theory promotes giving Alzheimer’s patients a cholinergic drug to stimulate neurons in the brain. Studies show the amount of acetylcholine in the body decreases in patients with Alzheimer’s disease. When enzyme production decreases, the brain does not receive messages necessary to recall information. Some doctors believe treating these patients with this drug improves cognition.

This medication is not advised for people with a blockage in their digestive or urinary tract caused by inflammation or tumor. Patients with a slow heartbeat might experience problems while taking a cholinergic agent because the medication slows the heart rate. It also is not recommended for patients with thyroid disorders, epilepsy, asthma, or gastric ulcers.

Side effects of the drug might include muscle cramps and pain. Some patients find they produce more saliva and stomach acid while using these drugs. Others suffer trouble breathing, headache, and sleepiness. Nausea and vomiting represent other common side effects of these medications.

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