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Bimix combines papaverine (smooth muscle relaxant) and phentolamine (alpha-adrenergic blocker), producing penile vasodilation and erection through two complementary pathways — without the prostaglandin E1 component that causes injection-site pain in some men.
No commercial Bimix product exists. It must be compounded from pharmaceutical-grade ingredients and is prescribed specifically for men with alprostadil sensitivity or as a pain-free alternative to Trimix.
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Bimix is a two-drug intracavernosal injection containing papaverine and phentolamine. It is prescribed as an alternative to Trimix for men who experience significant penile pain at the alprostadil injection site, or as a starting formulation before titrating to Trimix if needed.
While slightly less potent than Trimix in most patients, Bimix maintains high success rates in treatment-refractory ED and is well tolerated by men sensitive to prostaglandins.
Erectile dysfunction in men intolerant to alprostadil pain, post-prostatectomy ED, diabetic neuropathy-related ED, alternative to Trimix
Starting dose: 0.05–0.1mL injected into lateral corpus cavernosum
Titrate to smallest dose producing 30–60 minute erection
Priapism (erection >4 hours — emergency), injection site bruising, penile fibrosis with chronic use, hypotension possible at large volumes.
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