Could ED Pills Damage Your Eyes?

When pills like Viagra and later Cialis were released to the market, millions of men rejoiced as it would help them get back to something they enjoyed.

However, the rise in popularity hasn’t necessarily been without potential concern.

And a recent study shows that men who take tadalafil, better known as Cialis, for years at a time, may end up harming their eyesight.

While the proof isn’t conclusive, some medical experts advise restraint.

Why Were Men Using Cialis Every Day?

One of the interesting things is that part of the reason men ended up using Cialis so consistently had less to do with ED (erectile dysfunction) and more to do with other urinary symptoms.

And that’s where the issues came in.

A large observational study found that men prescribed tadalafil for urinary symptoms related to an enlarged prostate were more likely to develop glaucoma and elevated pressure inside the eye than men who were not taking the drug.

Now the findings do not prove that tadalafil causes glaucoma.

They do suggest that long-term users, especially those with eye-related risk factors, may benefit from regular eye exams.

Tadalafil belongs to a group of medications called PDE5 inhibitors. Sildenafil, or Viagra, is another well-known drug in the same class.

These medications are commonly used for erectile dysfunction.

Tadalafil is also prescribed for urinary urgency, frequency, and other symptoms caused by benign prostatic hyperplasia, or BPH.

When used for BPH, tadalafil may be taken daily for years. That makes long-term safety especially important.

Previous research has raised questions about PDE5 inhibitors and several eye conditions, including problems involving the optic nerve and retina. The evidence around glaucoma has been less clear.

Researchers wanted to know whether chronic tadalafil use might change that risk.

So they examined health records from 73,854 men age 40 and older.

About half had been prescribed tadalafil or another PDE5 inhibitor for urinary symptoms. The other half had not.

Researchers matched the groups for many factors that could affect eye health, including age, smoking, diabetes, cardiovascular disease, obesity, kidney function, cholesterol levels, and other medications.

Over five years, men prescribed tadalafil were:

• 22% more likely to be diagnosed with glaucoma

• 32% more likely to develop elevated eye pressure

• 33% more likely to develop primary open-angle glaucoma

• 33% more likely to begin glaucoma treatment

The pattern also appeared among some men who developed glaucoma within the first several months after starting treatment.

Those numbers deserve attention. They do not mean that one in three tadalafil users will develop glaucoma. They describe relative differences between the two groups.

How Does this produce Glaucoma?

Glaucoma damages the optic nerve, which carries visual information from the eye to the brain.

The most common form, primary open-angle glaucoma, often develops slowly and may cause no obvious symptoms at first. Vision loss can become permanent before a person realizes something is wrong.

Elevated pressure inside the eye is a main risk factor, although glaucoma can also occur when eye pressure is within a normal range.

That is why routine eye exams matter, especially for people with a family history of glaucoma, existing ocular hypertension, severe nearsightedness, or other risk factors.

This was an observational analysis of medical records. Again, it cannot show that tadalafil directly caused the higher rates of glaucoma.

Researchers could not perfectly track whether patients actually took the medication as prescribed, whether prescriptions changed over time, or whether new health problems developed during follow-up.

Most participants were White, so the results may not apply equally to every population.

Those limitations matter. The findings warrant closer study, not that patients should stop taking tadalafil on their own.

What Patients Should Do

For men who benefit from tadalafil, especially for urinary symptoms, the medication may still be entirely appropriate.

The practical question health researchers are now asking is whether eye monitoring should become part of long-term care.

Patients taking tadalafil regularly may want to ask whether they should have a baseline eye exam and how often follow-up makes sense. That conversation becomes more important for anyone with glaucoma, elevated eye pressure, a strong family history of the disease, or severe nearsightedness.

If regular eye care is difficult to access or afford, raise that with the prescribing clinician rather than quietly skipping follow-up.