Anterior uveitis in a hypertensive patient, the drug of choice to decrease IOP –
**Core Concept**
Anterior uveitis refers to inflammation of the anterior segment of the eye, which includes the iris and the ciliary body. In a hypertensive patient, managing intraocular pressure (IOP) is crucial to prevent further complications such as glaucomatous damage. The goal is to select a medication that effectively reduces IOP while taking into account the patient's underlying condition.
**Why the Correct Answer is Right**
In a hypertensive patient with anterior uveitis, the drug of choice to decrease IOP is a topical alpha-2 adrenergic agonist, such as brimonidine. This class of medication works by stimulating alpha-2 adrenergic receptors in the ciliary body, leading to a decrease in aqueous humor production and an increase in uveoscleral outflow. This results in a reduction in IOP. Additionally, alpha-2 adrenergic agonists have a mild vasoconstrictive effect, which can help reduce inflammation in the anterior uvea.
**Why Each Wrong Option is Incorrect**
* **Option A:** **Pilocarpine** is a miotic agent that works by stimulating muscarinic receptors in the iris sphincter muscle, causing constriction of the pupil and a decrease in IOP. However, in a hypertensive patient, pilocarpine may not be the best choice due to its potential to cause systemic side effects and its limited ability to reduce IOP in the short term.
* **Option B:** **Timolol** is a non-selective beta-blocker that reduces IOP by decreasing the production of aqueous humor. While timolol is effective in reducing IOP, it may not be the best choice in a hypertensive patient due to its potential to worsen systemic hypertension.
* **Option C:** **Dorzolamide** is a carbonic anhydrase inhibitor that reduces IOP by decreasing the production of aqueous humor. However, dorzolamide is not typically used as a first-line treatment for anterior uveitis due to its potential to exacerbate inflammation.
**Clinical Pearl / High-Yield Fact**
In patients with anterior uveitis, it's essential to use a medication that not only reduces IOP but also has anti-inflammatory properties. Topical corticosteroids, such as prednisolone, are often used in conjunction with a topical alpha-2 adrenergic agonist to manage inflammation and reduce IOP.
**Correct Answer:** B. Timolol.