**Core Concept**
Atropine is an anticholinergic medication that blocks the action of acetylcholine at muscarinic receptors in the central and peripheral nervous system. Its adverse effects are primarily due to the disruption of parasympathetic tone, leading to various systemic and ocular manifestations.

**Why the Correct Answer is Right**
Atropine's anticholinergic effects can cause dry mouth (xerostomia) due to reduced salivation, blurred vision (cycloplegia and mydriasis) due to relaxation of the ciliary muscles and sphincter pupillae, and urinary retention due to decreased detrusor muscle contractility. Additionally, atropine can cause tachycardia, hypertension, and hyperthermia by blocking the parasympathetic control of the heart and sweat glands.

**Why Each Wrong Option is Incorrect**
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**Clinical Pearl / High-Yield Fact**
Atropine's anticholinergic effects can be reversed with physostigmine, an acetylcholinesterase inhibitor that increases the concentration of acetylcholine at muscarinic receptors.

**Correct Answer:**
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