Trimix Side Effects: Common Ones and Emergencies
Pain in the penis and bruising at the injection site are among the side effects listed for alprostadil injection, one of the three medicines in Trimix. The serious risks are priapism, an erection that will not go down, and scar tissue over time. An erection lasting longer than 4 hours needs emergency treatment.
Key facts
- Trimix has no FDA label, so this page draws on the labels for its three medicines and on published guidance about injection therapy.
- Pain in the penis is the most common side effect on the alprostadil label.
- An erection lasting longer than 4 hours is a medical emergency. Untreated priapism can cause lasting damage.
- Repeated injections can cause scar tissue. Report any new lump, curve or hardening to your provider.
- Never change your dose yourself, and never combine Trimix with other ED medicines.
What are the common side effects of Trimix?
The FDA label for alprostadil injection lists pain in the penis as its most common side effect. Others on that label include:
- Bruising, bleeding or a small collection of blood at the injection site
- Redness, rash or itching
- Swelling of the penis
- Blood in the semen
- Dizziness or low blood pressure
Cleveland Clinic advises reporting injection site pain, redness or bruising if it continues or bothers you. Your provider can adjust the prescription, so tell them rather than putting up with it.
The alprostadil label also reports needles breaking, with part of the needle staying in the penis. Never straighten or reuse a bent needle. The papaverine label says to stop if signs of a liver reaction appear, so tell your provider about yellowing of the skin or eyes.
What is priapism, and when is it an emergency?
Priapism is an erection that lasts far longer than it should and does not go down. The American Urological Association guideline calls it the most serious adverse event of injection therapy, and it is why your provider sets the dose and it is never changed without them. The papaverine label says papaverine is not indicated for injection into the penis, and reports persistent priapism that needed medical and surgical treatment.
An erection lasting longer than 4 hours is a medical emergency. Go to an emergency department. If a rigid erection turns painful, go sooner: the American Urological Association guideline says to reach an emergency room within two to four hours of the injection. Do not wait for it to pass. Tell the staff you used a penile injection and name the medicines in it. Doctors treat priapism with medicine injected into the penis and by drawing out blood. Without treatment it can cause lasting damage, including permanent loss of erections.
Can Trimix cause scar tissue?
Yes. The alprostadil label warns of penile fibrosis, which is hardening or scarring of the tissue, and says treatment should stop if it appears. Published reviews name fibrosis among the reasons men stop injection therapy.
The label also asks for regular check-ups at a provider's office, so ask your provider how yours are handled. Follow the pharmacy's written instructions, and report any new lump, curve or hardening to your provider.
Who should not use Trimix?
Tell your provider about every medicine and condition before you start. The labels for its three medicines, along with the safety information for CHROMA Trimix, rule out:
- Sickle cell anemia or trait, multiple myeloma and leukemia, which make priapism more likely
- Peyronie's disease, cavernosal fibrosis, penile implants or a deformed penis
- A past heart attack, angina or coronary artery disease
- Nitrate medicines
Tell your provider too if you take blood thinners or blood pressure medicines, or if you have a bleeding problem, low blood pressure or a past episode of priapism.
Seek immediate help if you have chest pain, dizziness or nausea during sexual activity.
Frequently asked questions
Is Trimix safe?
Trimix has real risks, including priapism and scar tissue, and it is not FDA-approved. A provider weighs those risks against your health history and decides whether it fits. The alprostadil label and the American Urological Association guideline describe first injections in a clinician's office. CHROMA23® is online, so read the pharmacy's instructions, message your provider with questions, and ask your doctor or a urologist if you would like a first injection in person.
Is it normal for the injection site to hurt?
Pain is the side effect the alprostadil label lists most often. Report pain that continues or bothers you. New lumps, curves or hardening also belong in a message to your provider.
How long does Trimix stay in your system?
Trimix has no FDA label, so there is no official figure. The part that matters for safety is the erection itself: if it lasts longer than 4 hours, get emergency treatment.
What should I do if I think I injected too much?
Do not inject again. Call Poison Control at 1-800-222-1222 or go to an emergency department. Do not wait for a reply from your provider.
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
- Papaverine hydrochloride injection label (DailyMed)
- Phentolamine mesylate for injection label (DailyMed)
- American Urological Association: erectile dysfunction guideline
- American Urological Association and SMSNA: diagnosis and management of priapism
- StatPearls: priapism (NCBI Bookshelf)
- A review of current and emerging therapeutic options for erectile dysfunction (Medical Sciences, 2019)
- 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.
Trimix for ED