// Hormone Optimization
Sexual Function After 40: The Hormones Nobody Checks
Jul 29, 2026 · 7 min read
Research suggests roughly half of men between 40 and 70 experience some degree of erectile dysfunction, with prevalence climbing every decade. Women entering perimenopause face a parallel reality: libido, arousal, and comfort all shift as estrogen and progesterone change. Both sexes tend to treat it as a mechanical problem. It’s usually a hormonal one.
This is an educational map of the territory — the hormones involved, the treatment categories that exist, and the questions worth taking to a physician. Nothing here is a recommendation to use any medication.
First, rule out the psychological
Sexual dysfunction has two broad drivers: emotional and physical. Anxiety, depression, stress, and relationship strain can all suppress function directly, and no medication aimed at the physical side will fix a psychological root cause. That conversation belongs with a qualified therapist or physician, and it’s worth having honestly before chasing compounds.
The hormonal layer
Assuming the psychological side is addressed, the physical side is largely endocrine. Four hormones do most of the work, and standard check-ups rarely measure all of them.
- ▸Testosterone — central to libido, arousal, energy, and erectile function in men; meaningful for libido and vitality in women too. Declines with age in both sexes.
- ▸Estrogen — yes, in men. Estradiol is converted from testosterone and is required for sperm production, bone density, libido, and erectile function. Too low is a problem; too high is a different one. Balance is the target, not elimination.
- ▸Progesterone — low in men but present, with subtle effects on libido and mood. In women, its decline in perimenopause is one of the earliest hormonal shifts.
- ▸Prolactin — the overlooked one. Elevated prolactin suppresses dopamine signaling and reproductive function in men; libido and satisfaction both suffer. It’s a single blood marker, and it’s almost never on a standard panel.
The treatment categories, explained
PDE5 inhibitors — sildenafil, tadalafil, vardenafil — are the best-known category. Their mechanism is elegant: sexual stimulation triggers nitric oxide release, which produces cGMP, which relaxes vascular smooth muscle and increases blood flow. PDE5 inhibitors block the enzyme that breaks cGMP down, prolonging the effect. They differ mainly in onset and duration, and they share similar side-effect profiles. These are prescription medications with real contraindications — cardiovascular status matters — which is why the prescription requirement exists.
Peptides are the longer-horizon category. PT-141 (bremelanotide) works through the central nervous system rather than the vascular system, acting on melanocortin receptors involved in arousal — a genuinely different mechanism, and notably one studied in both men and women. A physician can tell you whether it’s appropriate and available in your jurisdiction.
Hormone optimization itself is the upstream fix: when testosterone, estrogen, progesterone, and prolactin are all in range, a meaningful share of dysfunction resolves without anything else. This is why the bloodwork comes first.
A warning about grey-market blends
The unregulated market sells combination pills — blends of multiple PDE5 inhibitors, or PDE5 inhibitors mixed with SSRIs — under catchy names. Understand what these are: uncontrolled doses of multiple prescription drugs, combined without medical rationale, manufactured without oversight, sold to people who haven’t been screened for the cardiovascular risks these drugs carry. Stacking vasodilators blindly is how a bedroom problem becomes an emergency-room problem.
If a product promises to be three prescription drugs in one pill and no doctor is involved, the correct response is to walk away.
The sequence that works
Get the full panel first: testosterone, estradiol, progesterone, prolactin, thyroid, fasting insulin, lipids. Identify what’s actually off. Address psychology where it’s the driver. Then, if medication is appropriate, have a physician prescribe and monitor it. Sexual function after 40 is a solvable problem for most people — but it’s solved with data, not with a pill bought from a website.
// Educational content only. Not medical advice. Prescription decisions belong to you and a licensed physician.
// Next step
Reading is education. Bloodwork is measurement. If you want this applied to your physiology, the application is the door.