Glaucoma Medications: What Patients in Northern Virginia Need to Know

Prostaglandin drops are usually the first medication prescribed because they are very effective and need to be used only once a day, typically at bedtime. They work by increasing the drainage of fluid out of the eye. Common examples include latanoprost, travoprost, and bimatoprost.

Over time, these drops can cause eyelashes to grow longer and darker, and may gradually darken the color of the iris or the skin of the eyelid. These changes are usually harmless but are permanent in the case of iris color change. Extra caution is needed for patients who are pregnant, have active eye inflammation, a history of herpetic eye disease, or who have recently had eye surgery.

Beta-blocker drops reduce eye pressure by decreasing the amount of fluid the eye produces. Timolol is the most commonly prescribed option and may be used once or twice daily depending on the formulation. These drops are often added as a second medication when a prostaglandin alone is not enough.

• Should be used with caution or avoided in patients with asthma, chronic obstructive pulmonary disease, slow heart rate, or heart failure
• May cause fatigue, shortness of breath, or slowed heart rate in some patients
• Can mask low blood sugar symptoms in people with diabetes
• May interact with oral beta-blockers or certain heart medications

Alpha agonists such as brimonidine lower eye pressure by reducing how much fluid the eye produces. These drops are typically used two to three times daily. Some patients experience eye redness, dry mouth, or mild drowsiness with this class of medication.

Alpha agonists should not be used in infants or very young children. They can interact with certain antidepressants called MAO inhibitors, so it is important to share a complete medication list with our team before starting this drug class.

Carbonic anhydrase inhibitor eye drops such as dorzolamide and brinzolamide also work by reducing fluid production inside the eye. They are typically used two to three times per day and are often combined with other medications for added pressure control. A brief bitter taste after using these drops is a common and harmless side effect.

These drops are derived from sulfonamide compounds, so use with caution is needed for patients who have had a severe sulfonamide allergy. They may also worsen corneal swelling in patients whose corneal inner layer is already compromised. If your medication is a suspension, shake the bottle well before each use.

When more than one medication is needed, our eye doctors may recommend a combination drop that contains two different medicines in a single bottle. This simplifies your daily routine and reduces the number of drops you need to put in your eye each day. Common combinations pair a beta-blocker with either a carbonic anhydrase inhibitor or an alpha agonist.

For many patients, combination drops are just as effective as using two separate bottles and are much easier to manage consistently. Consistency is one of the most important factors in keeping glaucoma under control.

In situations where eye pressure needs to be lowered quickly or eye drops alone are not sufficient, we may prescribe oral carbonic anhydrase inhibitors such as acetazolamide. These pills affect the whole body and can cause frequent urination, tingling in the fingers and toes, and changes in taste. Because of the potential for wider side effects, oral medications are generally used short-term while other treatments are being planned.

Newer classes of eye drops, including rho kinase inhibitors such as netarsudil, work through a different pathway to improve fluid drainage. Common effects include eye redness and small visible blood spots on the white of the eye. Sustained-release drug delivery options are also available for selected patients and may help reduce the daily drop burden. Our eye doctors stay current with these advances so you have access to the most effective options.

We watch for pressure readings that remain above your target range despite consistent drop use, as well as any worsening in visual field tests or optic nerve appearance. Some medications that work well initially can become less effective over time, a gradual shift sometimes called tachyphylaxis or pressure drift. Catching this early through regular monitoring allows us to adjust treatment before meaningful vision loss occurs.

If a medication causes side effects you cannot tolerate, or simply does not lower your pressure enough, we may switch you to a different class of drops. Our eye doctors will explain exactly how to make the transition, which sometimes involves stopping one medication and starting another on the same day.

• Each medication class works through a different mechanism, so alternatives are often available
• What causes side effects in one patient may be perfectly well tolerated by another
• Give new medications several weeks to reach their full effect before judging how well they work

Many patients eventually need more than one drop to maintain safe eye pressure. We typically add medications one at a time so we can clearly see how much each one contributes. Combining drops from different classes often lowers pressure more effectively than increasing the dose of a single drop.

Each time a new medication is added, we review your full drop schedule with you to make sure the timing and technique for each one is clear. Using combination drops when possible can simplify a multi-medication routine.

If medications are not providing adequate pressure control, or if daily drops are difficult to use consistently, laser treatment may be recommended. Selective Laser Trabeculoplasty (SLT) is an in-office procedure that lowers eye pressure by improving the eye's natural drainage. It is often well tolerated and can be repeated if needed. For angle-closure glaucoma, YAG Laser Peripheral Iridotomy (YAG PI) is used to open the drainage angle and may reduce or eliminate the need for certain medications.

In some cases, Minimally Invasive Glaucoma Surgery (MIGS), specifically a procedure called goniotomy, may be considered to create a more lasting improvement in drainage. For more complex or advanced glaucoma, we coordinate closely with glaucoma specialists to make sure you receive the most appropriate level of care.

Sudden severe eye pain, particularly when accompanied by nausea, vomiting, blurred vision, or halos around lights, can signal acute angle-closure glaucoma, a medical emergency. Rapid vision loss or an eye that appears red and feels firm also require urgent evaluation. If you experience these symptoms, contact our office right away. If you cannot reach us promptly, go to the nearest emergency department. Acute angle-closure glaucoma can cause permanent vision loss within hours without prompt treatment.