Dozens of commonly prescribed medications can cause or worsen dry eye, and the list is longer than most people realize. Antihistamines, blood pressure drugs, antidepressants, acne medications, and hormone therapies are among the most frequent culprits. If your eyes started feeling gritty, irritated, or constantly dry after beginning a new prescription, there’s a good chance the medication is involved.
How Medications Dry Out Your Eyes
Your tear film has three layers: an oily outer layer, a watery middle layer, and a mucus layer that sits against the eye’s surface. Medications can disrupt any of these. Some drugs block the nerve signals that tell your tear glands to produce fluid. Others shrink or damage the tiny oil glands along your eyelids, causing tears to evaporate too quickly. A few medications cause scarring in the tissue lining the eyelids, which permanently reduces tear production if the drug isn’t stopped in time.
The mechanism matters because it determines whether the dryness is reversible and how best to manage it while you’re on the medication.
Antihistamines and Allergy Medications
Antihistamines are one of the most common causes of drug-related dry eye, which creates an uncomfortable irony for people taking them to relieve itchy, watery allergic eyes. Both over-the-counter and prescription antihistamines block a type of receptor called M3 that controls fluid secretion in the tear gland and mucus production in the eye’s surface cells. When those receptors are blocked, you produce less of both the watery and mucus components of tears, making the tear film unstable.
First-generation antihistamines (like diphenhydramine) tend to cause more drying than newer options, but second-generation versions can still contribute. Oral decongestants often packaged alongside antihistamines compound the problem by reducing blood flow to mucous membranes, including those around the eye.
Antidepressants and Anti-Anxiety Drugs
About 38 to 41% of patients taking common antidepressants show signs of dry eye disease. Older tricyclic antidepressants have strong anticholinergic effects, meaning they block the same nerve pathways that antihistamines do. SSRIs and SNRIs (the most widely prescribed antidepressants today) have a weaker anticholinergic profile but still contribute to dry eye at meaningful rates.
If you’re on an antidepressant and experiencing eye discomfort, it’s worth raising with your prescriber. There can be meaningful differences in drying effect between medications within the same class.
Blood Pressure and Heart Medications
Several categories of cardiovascular drugs can reduce tear production. Beta-blockers, including metoprolol, propranolol, atenolol, and carvedilol, are well-documented causes. Thiazide diuretics like hydrochlorothiazide also contribute, with population data from the Beaver Dam Eye Study showing a modest increase in dry eye risk over ten years of use. Alpha-agonists such as clonidine appear on the list as well.
Beta-blockers are also used in eye drop form to treat glaucoma (timolol is the most common), and these topical versions can cause dry eye through direct contact with the eye’s surface on top of the systemic drying effect.
Isotretinoin for Acne
Isotretinoin (originally branded as Accutane) is one of the most potent causes of drug-related dry eye. It works by shrinking oil-producing glands throughout the body, including the meibomian glands in your eyelids. These glands produce the oily outer layer of your tear film that prevents evaporation. Without enough oil, tears break down within seconds of blinking.
Research shows significant deterioration in meibomian gland function within three months of starting isotretinoin, which is typically when eye symptoms peak. Patients report noticeably higher dry eye symptom scores during treatment and even shortly after stopping. The good news: studies describe these changes as largely reversible, with gland function improving after the course ends. However, higher cumulative doses may cause more persistent changes.
Hormone Replacement Therapy
Postmenopausal women using hormone replacement therapy have a higher risk of dry eye, which may seem counterintuitive since declining estrogen is itself linked to eye dryness. Data from the Women’s Health Study found that estrogen-only therapy increased dry eye risk by 69% compared to no hormone therapy. Combined estrogen-plus-progestin therapy raised the risk by 29%. The exact mechanism is still debated, but estrogen and androgen receptors in the tear glands are sensitive to hormonal shifts in both directions.
Eye Drops That Make Dry Eye Worse
This is the one that surprises people most: the eye drops you’re using to treat dry eye may be making it worse. Many prescription and over-the-counter eye drops contain a preservative called benzalkonium chloride (BAK). Lab research shows that concentrations as low as 0.0001% can damage corneal and conjunctival cells, and the concentration matters more than how long the drop sits on the eye. With repeated daily use over months or years, these preservatives can break down the very surface they’re meant to protect.
Glaucoma patients are especially vulnerable because they use preserved drops multiple times a day, often for decades. If you use any eye drops regularly, look for preservative-free formulations.
Other Medications Linked to Dry Eye
Several other drug classes are associated with dry eye through various mechanisms:
- Chemotherapy drugs: Taxanes and aromatase inhibitors (used in breast cancer treatment) can damage meibomian glands, sometimes permanently.
- Immunotherapy: Immune checkpoint inhibitors used in cancer treatment can trigger an autoimmune-like attack on the tear glands, causing severe dryness.
- Diabetes medications: Gliptins (DPP-4 inhibitors) have been linked to scarring of the inner eyelid lining in rare cases.
- Dupilumab: This biologic used for eczema and asthma can cause eye inflammation and scarring that reduces tear production.
- Anti-seizure drugs: Lamotrigine has been associated with scarring-type changes to the conjunctiva.
- Cholesterol-lowering statins: A possible but unproven association exists. The evidence isn’t strong enough to confirm the link.
Corticosteroids and NSAIDs (nonsteroidal anti-inflammatory drugs) round out the list of conventional medications flagged by the Dry Eye Workshop II as contributing to ocular surface disease.
Is Drug-Induced Dry Eye Reversible?
In most cases, yes. Dry eye caused by antihistamines, antidepressants, and blood pressure medications typically improves when the drug is stopped or switched. Isotretinoin-related dry eye tends to improve after the treatment course ends, though recovery can take weeks to months depending on the degree of gland changes.
The exceptions are drugs that cause structural damage. Medications that scar the inner eyelid (like gliptins or dupilumab in severe cases) or cause significant meibomian gland atrophy from prolonged use may leave lasting effects. Chemotherapy agents that destroy gland tissue can cause irreversible changes. The earlier the connection is recognized, the better the outcome.
If stopping or switching the medication isn’t an option, preservative-free artificial tears, warm compresses to support oil gland function, and in some cases prescription dry eye treatments can manage symptoms effectively while you continue the medication you need.