Trimix for ED: What It Is and How It Works
Trimix is a compounded injection for erectile dysfunction that combines alprostadil, papaverine and phentolamine. It is injected into the erectile tissue of the penis, where it relaxes the muscle so blood can flow in. It is a prescription, it is not FDA-approved, and a provider decides whether it fits.
Key facts
- Trimix combines three medicines: alprostadil, papaverine and phentolamine.
- It is injected directly into the erectile tissue, so it does not depend on the pathway ED pills use.
- It is compounded for each prescription and is not FDA-approved.
- The alprostadil label and the American Urological Association guideline both describe first injections in a clinician's office. CHROMA23® is online: your pack holds the pharmacy's written instructions, and you can message your provider with questions.
- An erection lasting longer than 4 hours is a medical emergency.
What is Trimix?
Trimix is a mixture of three medicines used for erectile dysfunction. Alprostadil is a prostaglandin. Papaverine is a vasodilator. Phentolamine is an alpha-blocker. A compounding pharmacy prepares the mixture for one patient from a prescription.
It belongs to a family of injections named for how many medicines they hold. Bimix has two, Trimix has three and Quadmix usually adds a fourth. The comparison page sets out how they differ.
How does Trimix work?
An erection depends on the smooth muscle in the penis relaxing so that blood can flow in. Each of the three medicines acts on that muscle by a different route. Because the injection goes straight into the erectile tissue, it does not need the nerve signal that tablets such as Viagra® depend on.
That difference is why injection therapy is often discussed when tablets have stopped working or cannot be used.
Who is Trimix for?
Trimix is typically prescribed when ED tablets have not worked well enough or are not an option. The American Urological Association guideline says men with ED should be told about injection therapy, including its benefits and burdens.
It does not fit everyone. The FDA label for alprostadil injection says it should not be used by men with conditions that make priapism more likely, such as sickle cell anemia or trait, multiple myeloma or leukemia. The same label excludes ED treatment in men with penile implants, Peyronie's disease, cavernosal fibrosis or a deformed penis. The label for phentolamine rules it out after a heart attack and with angina or coronary artery disease. Trimix is not for use with nitrate medicines. Tell your provider about any of these, along with every medicine you take.
Where does the first injection happen?
The FDA label for alprostadil injection says first doses are given in a provider's office, where the dose is set and the injection is taught. The American Urological Association guideline also says men considering injection therapy should have an in-office injection test.
CHROMA23® is online, so there is no office visit. Your pack holds written instructions from the pharmacy, and you can message your provider with questions. If you would like your first injection done in person, ask your doctor or a urologist.
How long does Trimix take to work, and how long does it last?
Trimix has no FDA label, so it has no official figure for onset or duration. For comparison, the label for Caverject Impulse®, an FDA-approved alprostadil injection, says to expect an erection within about 5 to 20 minutes, lasting no more than 1 hour. Those figures belong to that product, not to Trimix. Your own response depends on the dose your provider sets.
An erection that lasts longer than 4 hours needs emergency treatment, and a painful one needs it sooner. The side effects page explains why.
Is Trimix safe?
Trimix carries real risks, and a provider weighs them against your health history. The main ones are priapism, scar tissue in the penis, pain and bruising. Compounded medicines also have no FDA review of their safety, effectiveness or quality before they reach patients. The FDA status page explains what that means.
How do you get Trimix online?
Trimix is a prescription, so it starts with a free assessment. CHROMA Trimix is listed on the Sexual Health page from $163 a vial, visit included, plus tax where required. You choose a plan and pay, then complete the intake. An independent licensed provider in your state, where available, reads your case and decides what fits. If a prescription is written, a licensed U.S. pharmacy fills it and ships it. You're notified at every step.
If a provider decides Trimix does not fit, your order is fully or partially refunded under the Refund Policy. The cost page covers what a vial includes.
Frequently asked questions
Does a Trimix injection hurt?
The needle is very fine and short. Pain in the penis is still the side effect the alprostadil label lists most often, so report it to your provider rather than putting up with it. Some men feel a dull ache after the injection.
Does Trimix have to be refrigerated?
Follow the storage directions on your vial and from your pharmacy. Compounded medicines carry their own beyond-use date, and the label on your vial is the one that counts.
Is Trimix a peptide?
No. Alprostadil is a prostaglandin, papaverine is a vasodilator and phentolamine is an alpha-blocker.
Can I use Trimix with Viagra® or another ED medicine?
No. Trimix is not combined with other ED medicines. The alprostadil label says the safety and effectiveness of combining it with other injected vasoactive medicines have not been established, and that the risks of prolonged erection, priapism and low blood pressure may be increased. Trimix is itself such a combination, which is one more reason your provider sets the dose.
Does Trimix protect against sexually transmitted infections?
No. The alprostadil label is clear that injection therapy gives no protection against sexually transmitted infections, including HIV.
About CHROMA23®
CHROMA23® brings weight loss, longevity, sexual health, hair, and skincare into one place. Every prescription decision is made by an independent provider licensed in the patient's state, where available, and every medication is dispensed by a state-licensed pharmacy. The assessment is free. One clear price per plan, shown in full before you pay. The medicine is real. The provider is real.
Sources
- Caverject Impulse® (alprostadil) full prescribing information
- American Urological Association: erectile dysfunction guideline
- Phentolamine mesylate for injection label (DailyMed)
- A review of current and emerging therapeutic options for erectile dysfunction (Medical Sciences, 2019)
- FDA: compounding and the FDA, questions and answers
- Cleveland Clinic: alprostadil intracavernosal injection
Keep reading
This article is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Compounded medications are not FDA-approved. Always consult a licensed provider about your individual situation. Figures from named clinical trials describe study populations; individual results vary and are not typical.
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