Medically reviewed by Anand Thakkar, MD, board certified in Internal Medicine (ABIM) and board certified through A4M in anti-aging and regenerative medicine. Last updated: October 9, 2026.
15 years of experience · Lincoln Park and Hanover Park · Supervised in-office test dose
Quad mix injections in Chicago give men another path when ED pills haven’t worked well enough, or aren’t a good fit. At Bliss MD, Dr. Anand Thakkar prescribes quad mix only after a full evaluation. Every new patient then starts with a supervised test dose in our office.
We offer bimix, trimix and quad mix at both clinics. One is in Lincoln Park, at 2707 N Halsted St. The other is in Hanover Park, at 1802 Irving Park Rd, serving the Schaumburg area. Visits are private and unhurried. Start with a free 15-minute discovery call.
In This Article
- What Are Quad Mix Injections?
- Is Quad Mix FDA-Approved?
- Who Quad Mix for ED Is For
- When Quad Mix May Not Be Right
- What to Expect at Bliss MD
- How Quad Mix Dosing Works
- Side Effects and Safety
- Quad Mix vs Trimix vs ED Pills
- How Much Do Quad Mix Injections Cost?
- Why Men Choose Bliss MD for ED Care
- Quad Mix Injection Reviews From Chicago Patients
- Quad Mix Injections FAQs
- Take the First Step, Privately
- Quad Mix Injections at Two Chicagoland Clinics
What Are Quad Mix Injections?
Quad mix is a compounded ED medicine given with a very fine needle into the side of the penis. Doctors call this intracavernosal injection therapy. The American Urological Association lists injection therapy among the established treatments for ED.
The mix is built on three well-studied medicines, with a fourth ingredient added. Each of the three core medicines works on a different part of an erection:
| Core medicine | Its role |
|---|---|
| Papaverine | Relaxes the smooth muscle of the erectile tissue |
| Phentolamine | Helps keep the small arteries open |
| Alprostadil (prostaglandin E1) | Widens the arteries so more blood flows in |
Bimix uses the first two. Trimix uses all three. Quad mix uses all three plus a fourth ingredient, compounded together in one vial. Because the medicine works right in the penis, it doesn’t depend on the same pathway as ED pills. That’s why it can help some men whose pills fall short.
Is Quad Mix FDA-Approved?
No. Compounded quad mix is not an FDA-approved drug, and neither are compounded bimix and trimix. Each vial is prepared for one patient’s prescription instead of being mass-produced. The FDA’s compounding Q&A explains how compounded medicines differ from approved ones.
Bliss MD uses only U.S.-based, FDA-inspected compounding pharmacies. We’ll tell you what’s in your vial, its strength and why we chose it.
Who Quad Mix for ED Is For
Quad mix for ED is often considered when:
- ED pills haven’t worked reliably, even at a full dose
- Pills cause headaches, flushing or other effects you’d rather avoid
- You take a medicine that shouldn’t be paired with ED pills
- Trimix helped, but not quite enough
- ED is tied to diabetes, blood vessel changes or prostate surgery
Quad mix isn’t automatically the first step. Plenty of men do well on trimix or bimix. Compare them in our guide to trimix or quad mix injections. We’ll recommend the option that fits your body and your goals.
When Quad Mix May Not Be Right
Injection therapy isn’t for everyone, so we review your history before prescribing. Quad mix injections may not be a good fit, or may need extra care, if you have:
- A blood disorder such as sickle cell disease, leukemia or multiple myeloma (higher risk of a prolonged erection)
- An implant in the penis, Peyronie’s curvature or old scarring
- A blood thinner, which makes bruising more likely
- Heart disease that makes sexual activity unsafe right now
- An allergy to any ingredient in the mix
Bring a list of every prescription, supplement and over-the-counter medicine you take. Nitrates and some blood pressure medicines matter here.
What to Expect at Bliss MD
Here’s how quad mix injections start at either clinic:
- Free discovery call. Fifteen minutes, by phone, to talk through your goals in confidence.
- A full first evaluation. We look at your hormones, blood sugar and diabetes risk, chronic conditions and weight. ED is often tied to them, and it can be an early sign of blood vessel problems.
- A supervised test dose. The first injection is the smallest one, and we titrate upward slowly while watching your response. An erection that overstays is treated on the spot.
- Hands-on training. You’ll practice drawing up and giving your dose, and learn what to steer clear of. You pick the delivery: a regular syringe or an auto-injector.
- Your monthly program. We supply the needles and syringes, alcohol pads and a sharps container.
- Fine-tuning. We adjust your dose based on your response, aiming for the lowest dose that does the job.
Each step is covered in more depth in our guide to quad mix dosage, test dose and side effects.
How Quad Mix Dosing Works
No two men need the same amount, so there’s no standard dose. Your physician chooses the strength of your mix. The amount you draw up is set during your test dose. Too little gives a weak response; too much raises the risk of an erection that won’t go down.
Our usual ceiling is two to three doses a week, with at least 24 hours between them. If one doesn’t work, skip the second try and phone us; we’ll rework it with you. The full walkthrough is in our dosing and side effects guide.
Side Effects and Safety
Most side effects of quad mix injections are mild. Careful dosing and good technique go a long way toward minimizing side effects. You may notice:
- Brief stinging at the needle, or an ache linked to the alprostadil
- A little bruising
- Feeling flushed or light-headed
- Over years of use, firm spots that can turn into scar tissue
Never pair quad mix with sildenafil (Viagra), tadalafil (Cialis) or PT-141 on the same occasion. Together they make a prolonged erection more likely.
Four hours is the hard limit. An erection that hasn’t gone down by then is an emergency, so go to the nearest ER. Before that point, ice can help, because cold narrows the blood vessels, and sometimes an antihistamine. We go over both at training; neither replaces the ER. The American Urological Association calls for prompt treatment of priapism.
Quad Mix vs Trimix vs ED Pills
| Quad mix | Trimix | ED pills | |
|---|---|---|---|
| What it is | Compounded injection: three core medicines plus a fourth ingredient | Compounded injection with three medicines | Tablets such as sildenafil or tadalafil |
| Where it works | Directly in the penis | Directly in the penis | Supports the body’s own erection signals |
| Often considered | When trimix needs more support | When pills fall short | Usually tried first |
| Dose | Set for you at a supervised test dose | Set for you at a supervised test dose | Standard tablet strengths |
Neither injection is “stronger” for every man; the right one depends on how you respond. See how injections compare with the P-Shot, shockwave and ED medication.
How Much Do Quad Mix Injections Cost?
We don’t post prices, because each plan is individual. Your first visit is a full evaluation, and it’s separate. After that, quad mix is a monthly program that covers your medication plus visits and lab work as needed. Trimix is set up the same way.
Insurance usually doesn’t cover these medicines, and Bliss MD doesn’t bill insurance. HSA and FSA funds are accepted, and CareCredit financing is available. Learn what shapes your quad mix cost.
Why Men Choose Bliss MD for ED Care
- A physician you’ll actually see. Dr. Thakkar is board certified in Internal Medicine (ABIM) and through A4M in anti-aging and regenerative medicine. He earned his MD at B.J. Medical College and did his residency at Chicago Medical School.
- Whole-person care. We check hormones, blood sugar and weight alongside ED. Learn how low testosterone and ED connect.
- Real choices. Bimix, trimix or quad mix, and a syringe or an auto-injector. We also offer the P-Shot and testosterone replacement therapy.
- Careful sourcing. Your mix comes from U.S.-based, FDA-inspected compounding pharmacies.
- Discreet visits. Private rooms, plain answers and no pressure.
Want the bigger picture first? Start with our overview of erectile dysfunction treatment.
Quad Mix Injection Reviews From Chicago Patients
“I had tried all the pills, but they gave me headaches and didn’t always work. After one appointment at Bliss MD, I had my confidence back. Quad Mix just works.”
Marcus D., Lincoln Park
“I was skeptical about injections but it’s easier than I thought — and way more effective. Dr. Thakkar and the team were incredibly discreet and professional.”
James S., West Loop
Individual experiences vary, and reviews are not a promise of results.
Quad Mix Injections FAQs
What are quad mix injections?
Quad mix is a compounded prescription medicine for erectile dysfunction. It contains the three trimix medicines (papaverine, phentolamine and alprostadil) plus a fourth ingredient. A small amount is injected into the side of the penis, where it relaxes the erectile tissue and lets more blood flow in.
Is quad mix FDA-approved?
No. Compounded quad mix is not an FDA-approved drug. It’s made for your individual prescription. Bliss MD uses only U.S.-based, FDA-inspected compounding pharmacies.
How fast do quad mix injections work?
Most men notice an erection within about 5 to 15 minutes. Arousal, circulation and your dose all affect the timing. Your test dose in our office shows how you respond.
How long does the erection last?
Usually 30 to 60 minutes once your dose is dialed in. We adjust toward a firm erection that settles down by itself.
Do quad mix injections hurt?
Most men feel a quick pinch from the very fine needle, and some notice a dull ache afterward. If the needle is the hard part, you can choose an auto-injector instead of a standard syringe.
How often can I use quad mix?
Most men are asked to stay at or under two to three uses a week, always at least 24 hours apart. Your physician may set a lower cap. A dose that doesn’t work is a reason to call us, never to inject twice.
Can I use quad mix with Viagra, Cialis or PT-141?
No, not together. Pairing quad mix with sildenafil (Viagra), tadalafil (Cialis) or PT-141 on the same occasion makes a stuck erection more likely. If you use more than one, we’ll tell you how to space them.
Can I combine quad mix with testosterone therapy?
Often, yes. Your first visit includes a hormone check, and if low testosterone is part of the picture, treating it can be part of the same plan.
What if an erection lasts more than 4 hours?
Head straight to the nearest ER. Four hours is the hard limit: past that point it’s a medical emergency, and quick treatment protects the tissue.
Does insurance cover quad mix injections?
Usually not. Bliss MD doesn’t bill insurance. HSA and FSA funds are accepted, and CareCredit financing is available.
Are quad mix injections available at both clinics?
Yes. Bimix, trimix and quad mix are offered at our Lincoln Park clinic in Chicago and our Hanover Park clinic, which serves the Schaumburg area.
Take the First Step, Privately
Book a Free 15-Minute Discovery Call
Tell us what’s going on, in confidence. We’ll explain whether quad mix, trimix, bimix or another option fits you. Prefer the phone? Call (630) 289-0440.
Quad Mix Injections at Two Chicagoland Clinics
Quad mix is offered at both clinics. Live or work in the northwest suburbs? See quad mix injections near Schaumburg.
Bliss MD – Lincoln Park
2707 N Halsted St, Chicago, IL 60614
Phone: (630) 289-0440 · Open in Maps
Bliss MD – Hanover Park (Schaumburg Area)
1802 Irving Park Rd, Hanover Park, IL 60133
Phone: (630) 289-0440 · Open in Maps
Sources
- American Urological Association. Erectile Dysfunction: AUA Guideline. auanet.org
- American Urological Association. Acute Ischemic Priapism: AUA/SMSNA Guideline. auanet.org
- UCSF Health. Penile Injections: A Patient Guide. ucsfhealth.org
- Memorial Sloan Kettering Cancer Center. Penile Injection Therapy. mskcc.org
- U.S. Food and Drug Administration. Compounding and the FDA: Questions and Answers. fda.gov
This page is educational and is not a substitute for medical advice. Compounded quad mix, trimix and bimix are not FDA-approved drugs.
