What is atropine used for, and how does it affect the body?

Question

I recently came across the medication atropine, and I was surprised to see that it has so many different uses. I know it’s sometimes used in eye exams to dilate pupils, but I also read that it can be used in emergency medicine, like for treating slow heart rate or even poisoning.

What exactly does atropine do in the body, and how does it work? Why is it used for such different conditions, from eye care to heart problems? Also, how quickly does it take effect, and how long do its effects last?

I’m also curious about its side effects. Since atropine affects the nervous system, does it cause dizziness, confusion, or other symptoms? Are there people who should avoid it, like those with heart conditions or glaucoma?

If anyone has been given atropine before, what was it used for, and how did it affect you? Did you experience any side effects, and was it helpful for your condition?

Dr Sujal Patil · Accepted Answer

Atropine is a medication that blocks the effects of acetylcholine (a neurotransmitter) on the nervous system, specifically on the parasympathetic nervous system.

Uses:
Eye Care: Atropine dilates the pupils by relaxing the muscles in the eye, which is useful for eye exams or treating certain eye conditions like uveitis.
Emergency Medicine: It helps treat bradycardia (slow heart rate) by increasing heart rate and can be used for poisoning (such as organophosphate poisoning) to reverse symptoms.
Effect and Duration:
Onset: Atropine works fairly quickly, within minutes when given via injection or orally.
Duration: Its effects last for a few hours, depending on the dosage and method of administration.
Side Effects:
Common side effects can include dry mouth, blurred vision, constipation, urinary retention, and dizziness. It can also cause confusion, especially in older adults.
Precautions: People with glaucoma, certain heart conditions, or urinary retention should avoid atropine, as it can worsen these conditions.
Personal Experience:
If you've been given atropine, it would typically be in a controlled setting, like an eye exam or an emergency situation. Most people experience side effects like dry mouth or blurred vision, but the benefits often outweigh the discomfort in medical emergencies.

What is atropine used for, and how does it affect the body? - #14644

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