Medications That Can Affect Eye Pressure & Glaucoma
A number of common prescription and over-the-counter medications are linked to changes in eye pressure through several different mechanisms. Here's what the evidence shows for each.
Overview
A number of medications, taken for entirely unrelated reasons, have been linked to changes in eye pressure or an increased risk of angle closure. The mechanisms differ significantly from drug to drug, so we've organized this page by medication class rather than by a single disease process. If you take any of the medications below, mentioning them at your eye exam helps us know what to watch for — it does not mean you need to stop taking them.
Corticosteroids (Drops, Pills, Inhalers, Nasal Sprays, Creams, Injections)
Steroids are the medication class most clearly and consistently linked to elevated eye pressure, through reduced drainage at the trabecular meshwork. Eye drops are the fastest and most potent route; oral, inhaled, intranasal, topical skin, and injected steroids carry a lower but real risk, particularly with prolonged or high-dose use. Roughly 30–40% of people show some pressure rise with sustained steroid exposure, with a smaller subset showing a more pronounced response. See our dedicated page on Steroid-Induced Glaucoma for more detail.
Topiramate & Other Sulfa-Based Medications
Topiramate (often prescribed for migraine prevention or seizures) has a well-documented, distinct mechanism: it can cause swelling of the ciliary body, which pushes the iris forward and narrows or closes the drainage angle — a form of secondary angle closure that is different from typical pupillary-block angle closure. This reaction is uncommon but can occur suddenly, typically within days to a few weeks of starting the medication or increasing the dose, often affecting both eyes at once, and is sometimes accompanied by a temporary shift toward nearsightedness. Other sulfonamide-related medications have occasionally been reported to cause a similar reaction.
Decongestants, Antihistamines & Other Pupil-Dilating Drugs
Over-the-counter decongestants, some antihistamines, certain antidepressants, and other medications with anticholinergic or pupil-dilating (mydriatic) effects can precipitate an acute angle-closure attack, but generally only in eyes that already have an anatomically narrow drainage angle. In eyes with normal, open angles, these medications do not pose this particular risk. This is one of several reasons we assess your angle anatomy with gonioscopy as part of a comprehensive glaucoma evaluation.
Calcium Channel Blockers
Some studies have explored a possible association between long-term calcium channel blocker use (a common blood pressure medication class) and open-angle glaucoma risk, with theories involving effects on blood flow to the optic nerve. However, the evidence is mixed and not universally confirmed across studies, and calcium channel blockers remain a mainstay, effective treatment for many cardiovascular conditions. This is an area of continued research rather than an established cause-and-effect relationship, and no change to a prescribed blood pressure regimen should be made without your prescribing doctor.
Why Your Medication List Matters
Because so many medications can influence eye pressure through such different mechanisms — direct effects on the drainage tissue, angle-narrowing from ciliary body swelling, or pupil dilation in a susceptible eye — a complete and current medication list is one of the most useful pieces of information you can bring to a glaucoma evaluation.
Frequently Asked Questions
Should I stop taking my medication?
No — please don't stop any prescribed medication without talking to the prescribing doctor first. Most people take these medications safely; we simply want to know your full medication list so we can watch for any effect on your eyes.
Which medication is most strongly linked to glaucoma?
Corticosteroids (by any route) have the clearest, most well-established, and most direct link to elevated eye pressure. Topiramate has a distinct but well-documented association with acute angle closure. Other associations, like calcium channel blockers, are less certain.
I have narrow angles — which medications should I be cautious with?
Decongestants, some antihistamines, certain antidepressants, and other drugs with anticholinergic or pupil-dilating effects can precipitate angle closure in eyes with anatomically narrow angles. Ask us about your specific angle anatomy at your exam.
Is the calcium channel blocker connection proven?
Not definitively. Some studies have suggested a possible association between calcium channel blockers and open-angle glaucoma risk, but the evidence is mixed and not universally confirmed, so this remains an area of ongoing research rather than an established cause-and-effect relationship.
See a glaucoma specialist. Dr. Robert Gunzenhauser is Harvard-educated and UCLA fellowship-trained in glaucoma, providing expert diagnosis and treatment for Medication-Associated Glaucoma at Inland Glaucoma Center in Upland, CA.