Bimix Urethral Gel is a compounded, prescription-only medication prepared by a licensed pharmacy. It is applied into the opening at the tip of the penis (the urethra), where the medication is absorbed through the urethral lining — so it is used without a needle. It combines two active ingredients, papaverine and phentolamine, and is custom-compounded to the strength your provider orders rather than mass-produced.
It is one option a provider may consider as part of care for erectile dysfunction (ED) — sometimes as a needle-free alternative for patients who are not suited to injectable therapy.
How does it work?
The two ingredients work together to relax the smooth muscle inside the penis and increase localized blood flow, which can support an erection when a patient is sexually stimulated. In this formulation they are absorbed through the lining of the urethra rather than by injection:
- Papaverine: a smooth-muscle relaxant (vasodilator) that helps widen blood vessels and increase blood flow into the penis (MedlinePlus monograph).
- Phentolamine: a non-selective alpha-adrenergic blocker that reduces the signals that constrict blood vessels, supporting the increased blood flow (DailyMed label).
What is it used for?
Providers may prescribe Bimix Urethral Gel as part of care for erectile dysfunction when they determine it is appropriate for a patient. Erectile dysfunction and its treatment options are described in the American Urological Association ED guideline. Only a licensed provider can decide whether this formulation is right for an individual; Bayview Pharmacy does not provide consultations or determine appropriateness, and a valid prescription is required.
How does it compare to other ED options?
ED treatments differ mainly in how they are taken. The table below describes those differences for education only.
| Option | Form / route | How it's used |
|---|---|---|
| Bimix Urethral Gel (papaverine + phentolamine) | Applied into the urethra (intraurethral) | Needle-free gel absorbed through the urethral lining |
| Bimix Injection (same ingredients) | Intracavernosal injection | Same two ingredients given as a small injection |
| Oral PDE5 inhibitors (e.g., sildenafil, tadalafil) | Tablet, by mouth | Taken before sexual activity |
| Other injectable therapy (e.g., Trimix) | Intracavernosal injection | Multi-ingredient injectable options |
| Triple-P Urethral Gel (adds alprostadil) | Applied into the urethra (intraurethral) | Needle-free three-ingredient gel |
Differences in form and route are described for education only and are not a statement that any option is better, stronger, or more effective. Your provider determines what is appropriate for you.
How is it used?
Bimix Urethral Gel is applied into the urethral opening at the tip of the penis following the exact technique, instructions, and dose set by your prescriber, who establishes your starting dose and any adjustments. It is used without a needle. Never change your dose on your own. If you are unsure about how to apply it or about your dosing, contact your prescriber, and a Bayview pharmacist is available if you have questions about your prescription.
Side effects & safety
As with any medication, side effects are possible. Reported effects of urethral therapy can include local burning, stinging, or irritation in the urethra or penis, aching, and dizziness or flushing. Report any of these to your provider.
Contact your provider promptly if you have new or worsening penile pain, curvature, or lumps, persistent urethral irritation, or any reaction that concerns you.
Who should not use it?
This therapy is not appropriate for everyone. It is generally avoided in men for whom sexual activity is inadvisable, and extra caution applies to those with conditions that raise the risk of prolonged erections (such as sickle cell disease, leukemia, or multiple myeloma), penile or urethral anatomical conditions, or a known sensitivity to the ingredients. Tell your provider about your health conditions and all medications you take so they can determine whether this formulation is appropriate for you.
How should it be stored?
Store exactly as directed on your label, which is often refrigerated and away from heat, light, and moisture. Keep it out of the reach of children, and do not use it after its expiration or beyond-use date.
Why is this compounded?
This preparation is not available as a standard manufactured product. Compounding lets a licensed pharmacy tailor the strength and dosage form to an individual prescription — for example, preparing papaverine and phentolamine as a urethral gel. As a 503A compounding pharmacy, Bayview Pharmacy prepares each order in small batches under USP <795> standards using quality ingredients.
Clinical details for prescribers
Formulation. Two-agent intraurethral (transurethral) vasoactive preparation delivering papaverine (non-specific phosphodiesterase inhibitor producing cavernosal smooth-muscle relaxation) and phentolamine (non-selective alpha-adrenergic antagonist attenuating sympathetic vasoconstriction) via the urethral mucosa, without intracavernosal injection.
Clinical role. Needle-free alternative where injection therapy is not preferred or tolerated — the same two agents delivered by Bimix Injection. A three-agent gel adding alprostadil is available as Triple-P Urethral Gel.
Counseling points:
- Individualized dose titration set by the prescriber
- Application technique training before independent use
- Priapism precautions: erection >4 hours is an emergency
Background: papaverine monograph; AUA/SMSNA priapism guideline.
This is a prescription-only compounded medication and is not FDA-approved. Your provider determines whether it is appropriate and sets the formulation and dose.
