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Sildenafil wasn’t originally developed for erectile dysfunction.
It was being studied as a cardiovascular medication.
The erectile effects were discovered because men in the trial noticed them and, famously, weren’t particularly interested in giving the medication back.
That’s not a footnote. It’s the origin story.
Today, sildenafil remains FDA-approved for pulmonary hypertension.
Tadalafil is approved not only for ED but also for urinary symptoms caused by an enlarged prostate.
Both medications have effects that extend well beyond sexual function.
We’ve spent twenty-five years calling them ED drugs.
That may be the least interesting thing about them.
The brain is a vascular organ.
The same nitric oxide–cGMP pathway involved in blood vessel function is active there too, which gives researchers plausible biological reasons to think PDE5 inhibitors could affect cognition and dementia risk.
Several large analyses have found that men taking these medications appear to develop Alzheimer’s disease at lower rates.
The signal has been strong enough that prospective trials are now being discussed.
But observational studies can tell us that two things occur together—not why.
Men taking PDE5 inhibitors may be more engaged with healthcare, more likely to have risk factors identified and treated, and more likely to receive ongoing medical care in general.
Those differences matter.
Some studies have failed to show a protective effect. At least one genetic analysis suggests the relationship may be more complicated than it first appears.
The vascular story is established.
The dementia story remains a hypothesis.
One worth studying.
Not one that’s ready for a prescription.
But maybe the most interesting part of this conversation isn’t lifespan.
It’s healthspan.
Most people don’t actually mean lifespan when they talk about longevity.
They mean living well for longer.
Sleeping through the night because you’re not getting up three times to urinate.
Maintaining intimacy.
Maintaining confidence.
Maintaining relationships.
Some would call that healthspan.
Others might call it quality of life.
You could even argue it’s sexspan.
Whatever label you prefer, those things matter enormously to the people living them.
If a medication improves urinary symptoms, preserves sexual function, and helps someone stay engaged in parts of life they value, that’s a meaningful contribution to healthy aging—even if it never adds a single day to a lifespan.
These are vascular medications.
They are urologic medications.
They are medications with effects that reach well beyond the bedroom.
The longevity conversation may eventually prove right.
What’s already clear is that they were never just ED drugs in the first place.
