Erections depend on blood flow, and blood flow depends on the health of the endothelium — the lining of the blood vessels. Atherosclerosis, the process that narrows arteries, affects that lining throughout the body.
The arteries supplying the penis are considerably narrower than the coronary arteries. Narrower vessels show the effect of the same degree of disease sooner. That is why erectile dysfunction can appear years before chest pain or any cardiac event.
What That Means in Practice
ED is not simply a sexual problem that happens to coincide with heart disease. In many men it is an early marker of it. The association is strongest in men under 60, in whom ED is less likely to be explained by age-related change alone.
This is the single strongest argument against treating ED purely as something to be solved by a tablet bought quietly online. The tablet may work perfectly well and the underlying issue continue undetected.
What Should Be Checked
A reasonable workup, which a GP can arrange, includes:
- Blood pressure
- Cholesterol and lipid profile
- HbA1c or fasting glucose — diabetes is a common cause of ED and often undiagnosed
- Testosterone, where symptoms suggest it
- A review of current medications, since several common ones contribute
- Smoking, alcohol, weight and activity
None of this is exotic, and all of it is more useful than a prescription alone.
Medications That Contribute
Several widely prescribed medicines can cause or worsen ED, including some beta blockers, thiazide diuretics and certain antidepressants. If your ED began after starting a new medicine, that timing is worth raising — there may be an alternative. Do not stop a prescribed medicine on your own to test the theory.
Nitrates: the Absolute Rule
If you take nitrates for angina — GTN spray, isosorbide mononitrate or similar — you must not take sildenafil, tadalafil, vardenafil or avanafil. The combination can cause a severe and dangerous fall in blood pressure. The same applies to recreational poppers.
This is the reason a pharmacist asks about heart medication before selling an over-the-counter ED tablet, and the reason buying from a source that asks nothing is genuinely risky rather than merely unregulated.
Is Sex Safe With Heart Disease?
For most people with stable cardiovascular disease, yes — the exertion involved is comparable to climbing a couple of flights of stairs. Where there is recent or unstable disease, this is a question for a cardiologist, and it deserves a direct answer rather than avoidance.
The Encouraging Part
The changes that improve cardiovascular health improve erectile function too, and they are the same list: stopping smoking, weight loss where relevant, regular exercise, blood pressure and cholesterol control, and reducing alcohol. Improvement in erectile function is often what makes those changes feel worth sustaining, which is a legitimate motivator.
The Point Worth Taking Away
ED medication works and is safe when properly assessed. The mistake is treating the symptom in isolation. If you have developed erectile dysfunction, particularly under 60, see a GP as well as sorting out a prescription — the symptom may be doing you a favour by arriving early.