NBEO Pharmacology Practice Exam 2026 - Free NBEO Pharmacology Practice Questions and Study Guide

Isosorbide belongs to the class of osmotic agents. These drugs are primarily used to reduce intraocular pressure in certain acute conditions, including diabetic acute angle closure, by drawing fluid out of the eye and promoting the temporary reduction of swelling. This action helps to alleviate the increased pressure within the eye that can occur during an acute angle-closure glaucoma episode.

Osmotic agents like isosorbide work by increasing the osmolarity of the plasma, which leads to an osmotic gradient that pulls excess fluid out of the ocular tissues. This rapid change can help relieve the acute symptoms and prevent damage to the optic nerve, making it a critical choice in emergency situations involving elevated intraocular pressure.

Understanding the pharmacological mechanism of osmotic agents is essential for effective management of acute angle closure, especially in diabetic patients who may have unique risks and considerations for ocular health.