If you have ever suffered from dry, irritated, or scratchy eyes, you are not alone. With a rising incidence of over 20 million affected people in the United States alone, dry eye disease is now considered a major ocular condition. It affects patients of all ages and can seriously impact your quality of life, both physically and psychologically.
When we experience dry eyes, our first instinct is usually to blame our environment—perhaps we stared at a computer screen for too long, or the air conditioning in the office is too high. However, the true culprit might be sitting right inside your medicine cabinet. If dryness is affecting your work, contact lenses, or laser-surgery planning, start with KSA's dry eye diagnostics.
How Medications Trigger Dry Eye
Today, we are diving into how everyday systemic medications trigger dry eye, and what you need to know if you are preparing for a life without glasses.
Understanding the Delicate Balance of Your Eyes
To understand why a pill you swallow affects the moisture in your eyes, we first need to define what dry eye actually is. According to recent global research, dry eye is a disease characterized by a "loss of homeostasis of the tear film". Homeostasis is just a medical term for perfect balance.
Your tear film needs a precise balance of water, oils, and mucus to remain stable, protect your eyes from inflammation, and keep your vision perfectly sharp. When you take certain medications, they can disrupt this balance through decreased tear production, altered nerve signals, or even direct irritation.
In fact, an incredible 22 out of the top 100 best-selling systemic medications in the US have been shown to possibly cause dry eye. Let's look at the most common offenders.
Common Medications That Cause Dry Eye
Allergy Pills and Decongestants
When allergy season hits, many of us reach for an antihistamine to dry up a runny nose. Unfortunately, antihistamines are not selective—while they dry up your nasal passages, they also reduce the amount of fluid available for your tears.
Furthermore, if you use a decongestant, it causes local vasoconstriction, which means it tightens your blood vessels. This alters the blood flow to your tear glands, ultimately leading to reduced tear production.
The Solution: If you need allergy relief, opt for "second-generation" antihistamines (like Claritin or Zyrtec) instead of older "first-generation" ones, as they have fewer drying side effects on the eyes.
Antidepressants
Medications used to treat depression and anxiety are incredibly helpful for mental health, but they also affect the chemical messengers (neurotransmitters) in your body. Older medications, known as Tricyclic antidepressants (TCAs), have strong drying effects.
Newer medications, such as SSRIs (like Zoloft or Prozac) and SNRIs (like Cymbalta), exclusively block the reabsorption of serotonin or norepinephrine.
The Solution: While any antidepressant can cause dry eye, clinical studies suggest that SSRIs disrupt tear film balance less than older TCAs, and SNRIs generally have even fewer dry eye associations than SSRIs.
Over-the-Counter Painkillers
We often pop an aspirin or ibuprofen for a headache without a second thought. But did you know that out of the nine systemic drugs known to be secreted directly into your tear film, eight of them cause dry eye? Aspirin and ibuprofen are among these medications.
When you take them, they are released into your tears, where they can increase tear evaporation and make the tear film unstable.
The Solution: These medications generally only cause dry eye issues when taken in excess of the recommended doses. Always stick to the recommended dosage.
The "Polypharmacy" Problem
As we get older, it is common to take multiple medications at once. In the medical world, using five or more prescription drugs simultaneously is called "polypharmacy". When you combine an allergy pill, an antidepressant, and a blood pressure medication, the side effects multiply, making it very difficult to predict exactly how dry your eyes will become.
Preparing for Laser Eye Surgery
If you are tired of dealing with dry eyes while wearing contact lenses, you might be considering laser eye surgery to fix your vision once and for all. At KSA Silmakeskus, our Flow3 procedure is an innovative, touch-free, and cut-free way to help you get rid of glasses. Because we do not use a scalpel to make cuts on the eye surface, the process is incredibly safe.
However, the laser relies on a healthy, stable tear film to do its job accurately. Furthermore, the recovery process requires a moist eye surface. After a Flow3 procedure, your eyes heal safely beneath breathable contact lenses for 5 to 6 days. Managing your medication-induced dry eye is the first critical step to ensuring a smooth, fast recovery.
What Should You Do Next?
Never stop taking your prescribed medications on your own. Instead, your first step is education and action. If you are wondering whether your eyes are healthy enough for laser surgery, take the free KSA quick test or book a Flow3 eye examination. We can discuss your medication list and see whether your tear film is stable enough for the Flow3 procedure.
Sources: TFOS DEWS II on iatrogenic dry eye, National Eye Institute on dry eye.
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