Anticholinergic

Definition

Anticholinergics are drugs that block the action of acetylcholine in the nervous system. They are used to treat various conditions, including those affecting the heart and respiratory systems.

5 Must Know Facts For Your Next Test

1. Anticholinergics can increase heart rate by inhibiting vagal nerve activity, which is useful in treating bradycardia.
2. These drugs can cause side effects like dry mouth, blurred vision, constipation, and urinary retention.
3. In emergency settings, anticholinergics like atropine are often administered to counteract severe bradycardia or asystole.
4. Atropine is a commonly used anticholinergic during cardiac arrest situations to help restore normal heart rhythm.
5. Overdose of anticholinergic drugs can lead to serious complications such as delirium, hallucinations, and hyperthermia.

Review Questions

• What is the primary action of anticholinergic drugs on the nervous system?
• Why might atropine be administered during a cardiac emergency?
• List three common side effects associated with anticholinergic medications.

Related terms

Bradycardia: A slower than normal heart rate, often below 60 beats per minute.

Atropine: An anticholinergic drug used to treat bradycardia and improve heart rate during cardiac emergencies.

Acetylcholine: A neurotransmitter involved in muscle activation and other functions within the parasympathetic nervous system.