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Castellano Health Institute
(714) 530-2183
Erectile Dysfunction Treatment · Orange County

Erectile Dysfunction is a signal. Find out what it’s signaling.

Erectile dysfunction is rarely just an erection problem. For men over 40, it’s often the first warning sign of low testosterone, cardiovascular disease, sleep apnea, or a medication side effect. Dr. Castellano runs the workup before writing the script — because what looks like ED is frequently something more important showing its hand.

Call to Schedule

Garden Grove · Mon–Fri 9 AM – 5 PM

What’s Actually Causing It

ED has more than one cause. Most clinics treat the symptom and move on.

The medical reality is that the underlying drivers fall into several categories — and the right treatment depends entirely on which one (or which combination) is actually in play.

  • Cardiovascular factors (atherosclerosis, hypertension, lipid issues, endothelial dysfunction)
  • Low testosterone (especially in men over 40)
  • Metabolic dysfunction (insulin resistance, type 2 diabetes)
  • Sleep disorders (untreated sleep apnea is a frequent driver)
  • Side effects of unrelated medications (some blood pressure drugs, SSRIs, others)
  • Neurological factors (less common, but real)
  • Psychological / relational factors (especially in younger men)
The Cardiovascular Framing

ED in a man over 40 deserves a cardiovascular workup.

The published research is consistent on this: erectile dysfunction frequently precedes cardiovascular events by three to five years. The penile arteries are smaller than the coronary arteries, so they show the early signs of endothelial dysfunction first. ED that shows up in your forties or fifties without a clear lifestyle explanation is a signal worth taking seriously.

That doesn’t mean every patient needs a cardiology workup day-one. It does mean the visit includes a real conversation about cardiovascular risk markers — lipid panel, blood pressure, fasting insulin, hs-CRP — alongside the hormone evaluation. Dr. Castellano refers to cardiology when the picture warrants it.

What the published research shows

ED frequently precedes a major cardiovascular event by several years. The vascular system responds to metabolic dysfunction in the smallest arteries first — and the arteries of the penis are among the smallest in the body. That’s why ED is often the earliest signal of broader cardiovascular or metabolic disease, and why the evaluation here treats it as a diagnostic opportunity rather than a symptom to medicate and move on from.

Mid-life couple in bed laughing together, both in white tops — restored intimacy when ED's underlying cause is properly diagnosed and treated
The TRT–ED Connection

Same hormone panel evaluates both. One visit, both questions answered.

Low testosterone presents as ED for a meaningful share of men. For these patients, fixing the testosterone often fixes the ED — and addresses other quietly-broken systems (energy, sleep, body composition, mood) at the same time. The same lab panel that anchors TRT evaluates the testosterone contribution to ED.

For other patients, testosterone is fine and the ED is vascular, medication-related, or psychological. The labs tell which scenario you’re in. There’s no point guessing.

The Honest Treatment Ladder

Cause-driven, not pill-first.

  1. 01

    Lifestyle and metabolic correction

    The foundation almost everyone skips. Sleep, alcohol, training, weight, blood pressure. Often moves the needle further than any prescription.

  2. 02

    Hormone correction (TRT) if labs indicate

    Low testosterone is a meaningful share of ED cases. Fixing the testosterone often fixes the ED — and addresses other quietly-broken systems at the same time.

  3. 03

    Generic PDE5 inhibitor

    Generic Sildenafil or Tadalafil. FDA-approved. Cheap. Effective for most men. Written by Dr. Castellano, filled at any pharmacy.

  4. 04

    Urology referral

    For cases needing acoustic-wave (shockwave) therapy, P-Shot, injection therapy, or surgical options like a penile implant. We refer to a vetted local urology practice.

What Most Clinics Don’t Tell You

Generic Sildenafil and Tadalafil are cheap, FDA-approved, and effective for most men.

Most patients don’t need a $300/visit specialty clinic for what turns out to be a $10–30/month generic prescription at any pharmacy. Specialty ED clinics market shockwave packages and PRP procedures aggressively because they’re higher-margin — but the evidence supports starting with the medical evaluation and the cheap evidence-based oral medications.

Dr. Castellano writes the prescription; you fill it at the pharmacy of your choice for the cash price. The visit covers the medical evaluation that should sit around any ED prescription — without it, you’re treating a symptom instead of finding what’s actually driving it.

How It Works

Four steps. Labs-led, like the rest of the practice.

  1. 01

    Sit-down visit

    1-hour, 1-on-1, confidential. Walk through the labs and the symptom picture. Honest read on what's driving the ED.

  2. 02

    Bloodwork

    Hormone + cardiovascular markers + metabolic panel + medication review. Lab order out same day you call.

  3. 03

    Build the plan

    Lifestyle correction. TRT if indicated. PDE5 inhibitor if appropriate. Urology referral if the picture warrants it.

  4. 04

    Recheck at 4–6 weeks

    Evaluate response. Adjust the plan based on how things are working. Side-effect monitoring built in.

Dr. Castellano — Orange County physician evaluating ED as a medical signal since 1999
About the Doctor

Confidential conversations, medical answers.

UC Irvine School of Medicine ('96). Board-certified in Family Medicine (ABFM). Advanced certifications in Anti-Aging and Regenerative Medicine (ABAARM, Anti-Aging Fellowship). Practicing in Orange County since 1999.

ED conversations belong in a doctor’s office, with one doctor who knows your history, in a private confidential visit — not a franchise clinic with a sales pitch. The same chart, the same eye on the labs, year after year.

UC Irvine '96
School of Medicine
ABFM
Family Medicine
ABAARM
Anti-Aging board
Fellowship
Anti-Aging
Common Questions

The questions men ask before they pick up the phone.

Don’t see yours? Call the office and ask Dr. Castellano directly — confidentially.

Could my ED be a sign of something more serious?
Honest answer: yes, sometimes. New-onset erectile dysfunction in a man over 40 is one of the earliest physical signs of cardiovascular disease — the small penile arteries show endothelial dysfunction before the larger coronary arteries do. That's why Dr. Castellano runs a cardiovascular and hormonal workup before writing a prescription. ED can be a five-year heads-up on something more important showing its hand.
Will TRT fix my ED?
Sometimes — if low testosterone is the actual driver. Sometimes ED has multiple drivers and TRT addresses one of them. Sometimes testosterone is fine and the ED is vascular, medication-related, or psychological. The lab values and the workup tell which scenario you're in. Guessing at it doesn't help.
Do you prescribe Viagra and Cialis?
Yes. Generic Sildenafil and Tadalafil are FDA-approved, well-evidenced, and effective for the majority of men with ED. They're inexpensive at any pharmacy ($10–30/month range for most patients). Dr. Castellano writes the prescription; the visit fee covers the medical evaluation that goes around it.
Do you do shockwave therapy or P-Shot?
No — shockwave (acoustic wave) therapy and P-Shot are urology-specialty procedures. Dr. Castellano refers to a vetted local urology practice when those are the appropriate next step. Honest scope: medical evaluation and prescription management here; urology procedures there.
What if my ED is psychological, not physical?
Real possibility, especially in men under 40. The workup helps separate physical from psychological — if the labs and cardiovascular markers come back clean and the picture fits a stress / anxiety / relational pattern, the right referral is sex therapy or couples counseling. Dr. Castellano can point you to the right specialist; we don't pretend that lane is ours.
Are PDE5 inhibitors safe long-term?
Generally yes for healthy patients, with the standard contraindications — particularly nitrate-class heart medications (nitroglycerin and similar). The full medication and condition history gets reviewed in the visit before the prescription is written. Side-effect monitoring is part of the follow-up cadence.
Can my partner come to the visit?
Yes — and often it's valuable. ED affects both people in a relationship, and partner involvement in the conversation can make the plan stick better. Up to you; not required either way.
Patient Voices

Real patients. Real reviews. Verified by Google.

Serving Orange County

ED evaluation across the OC corridor.

The clinic sits on S Euclid St in Garden Grove — easy reach from Anaheim, Westminster, Santa Ana, and the wider OC corridor. Free on-site parking.

We see patients from Garden Grove, Anaheim, Westminster, Stanton, Santa Ana, Cypress, Buena Park, Orange, Fountain Valley, Huntington Beach, Costa Mesa, Tustin, Fullerton, Long Beach, Los Angeles, and across Orange County.

Ready when you are

Book the 1-hour consult.

Confidential, professional, in-office or telehealth. Bring whatever bloodwork you have on file. The conversation is straightforward and non-judgmental — every man over 40 has this conversation eventually.

Call (714) 530-2183Get directions
12460 S Euclid St, #101 · Garden Grove, CA 92840
Mon–Fri 9 AM – 5 PM

Calling after hours? Leave a message — we’ll get back to you the next business day.