Nelson Vergel
Founder, ExcelMale.com
Invicorp for ED: What Patients Actually Say About It
By Nelson Vergel, Founder, ExcelMale.com
If Viagra and Cialis have stopped working for you, penile injections are usually the next step, and most men in the US end up on trimix. But there's another injectable that comes up constantly in ED forums, especially among men in the UK, Ireland, and the Nordics: Invicorp. It's a fixed-dose combination of aviptadil (a synthetic version of vasoactive intestinal peptide, or VIP) 25 mcg and phentolamine mesylate 2 mg. Here's what real users report, pulled from forum discussions, alongside what the drug is and how it's accessed.
What Invicorp is
Invicorp works differently from alprostadil (Caverject, Edex). Aviptadil relaxes the smooth muscle and slows blood flow out of the penis; phentolamine, an alpha-blocker, increases blood flow in. Together they produce an erection, usually within 5 to 15 minutes, lasting about an hour. Unlike alprostadil, it's a single fixed dose with no titration. You inject no more than once in 24 hours and no more than three times a week.
The main reason men switch to it: less pain
The dominant theme in forum reports is that Invicorp hurts far less than alprostadil. Most men who try it are refugees from Caverject, where the prostaglandin caused a deep, aching pain. One long-term UK user ran his own dose experiment and reported zero pain, erection quality that held while standing (unlike alprostadil), and the same result at 40 to 50% of the standard dose as at a full dose. Another said that after three months, a full dose gave him a solid 3.5-hour erection every time with no pain at all (FrankTalk Invicorp thread). This matches the clinical literature, which is exactly why Invicorp exists: it's positioned for men who can't tolerate prostaglandin injections. If prostaglandin pain is your problem, our members cover the same issue with alprostadil in the 27 Questions about penile injection therapy thread.
The thing that catches first-timers off guard
Invicorp usually needs sexual stimulation to produce a full erection. Alprostadil erects you on its own; Invicorp often gets you to a partial erection and relies on arousal for the rest. Several forum users panicked on their first dose, thinking the drug had failed, when they got "50 percent" and no more (FrankTalk: Invicorp & Caverject question). That's expected behavior, not a dud. This is the opposite of trimix, which works with or without arousal, as members describe in our How To Inject Trimix guide. If you try Invicorp, know this going in.
It's not risk-free
The gentle reputation can be misleading, because individual response varies a lot. One user's very first injection, at half the standard dose, gave him a 4-hour erection and a genuine priapism scare. That's the argument for starting low and having your urologist's number and your ER plan written down before your first at-home injection. Any erection past 4 hours is an emergency: go to the ER, and tell them you used a penile injection.
Some users also report the effect fading over months and start pushing the dose up well past a single ampoule to compensate (FrankTalk: injections losing efficacy). That's off-label and risky. The usual forum debate applies: it may be dose creep, or it may be the underlying ED progressing rather than the drug weakening. The same "start low, go slow" priapism protocol our members follow for trimix applies here, and you'll find the full version in the founding Trimix thread.
Where you can actually get it
This is where US members hit a wall. Invicorp is not FDA-approved in the United States and can't be obtained through legal US channels. It's licensed and prescription-only in the UK, Ireland, the Nordic countries (Sweden, Denmark, Finland, Norway), New Zealand, and France (though France doesn't reimburse it). In the UK it's typically "specialist-initiated," meaning a hospital urologist starts you on it and trains you before your GP takes over prescribing.
For US men, the practical equivalent isn't Invicorp. It's compounded trimix or bimix from a compounding pharmacy, or FDA-approved alprostadil (Caverject, Edex). The aviptadil-plus-phentolamine combination specifically isn't available here as a finished product. Supply of Invicorp itself is also inconsistent even where it's licensed; it goes out of stock periodically, which pushes men toward compounded options anyway.
Bottom line
For men who found alprostadil too painful, Invicorp is a real option where it's available, mostly Europe and New Zealand. It trades the pain of prostaglandin for a milder injection that leans on arousal to finish the job. If you're in the US, it's worth understanding for context, but trimix or bimix from a good compounding pharmacy is the route you'll actually use. Start with our real-world Trimix guide if that's where you're headed.
The reports above are anecdotal accounts from ED forums, not clinical data, and men posting them are often self-adjusting doses beyond the label. This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting or modifying any treatment.
By Nelson Vergel, Founder, ExcelMale.com
If Viagra and Cialis have stopped working for you, penile injections are usually the next step, and most men in the US end up on trimix. But there's another injectable that comes up constantly in ED forums, especially among men in the UK, Ireland, and the Nordics: Invicorp. It's a fixed-dose combination of aviptadil (a synthetic version of vasoactive intestinal peptide, or VIP) 25 mcg and phentolamine mesylate 2 mg. Here's what real users report, pulled from forum discussions, alongside what the drug is and how it's accessed.
What Invicorp is
Invicorp works differently from alprostadil (Caverject, Edex). Aviptadil relaxes the smooth muscle and slows blood flow out of the penis; phentolamine, an alpha-blocker, increases blood flow in. Together they produce an erection, usually within 5 to 15 minutes, lasting about an hour. Unlike alprostadil, it's a single fixed dose with no titration. You inject no more than once in 24 hours and no more than three times a week.
The main reason men switch to it: less pain
The dominant theme in forum reports is that Invicorp hurts far less than alprostadil. Most men who try it are refugees from Caverject, where the prostaglandin caused a deep, aching pain. One long-term UK user ran his own dose experiment and reported zero pain, erection quality that held while standing (unlike alprostadil), and the same result at 40 to 50% of the standard dose as at a full dose. Another said that after three months, a full dose gave him a solid 3.5-hour erection every time with no pain at all (FrankTalk Invicorp thread). This matches the clinical literature, which is exactly why Invicorp exists: it's positioned for men who can't tolerate prostaglandin injections. If prostaglandin pain is your problem, our members cover the same issue with alprostadil in the 27 Questions about penile injection therapy thread.
The thing that catches first-timers off guard
Invicorp usually needs sexual stimulation to produce a full erection. Alprostadil erects you on its own; Invicorp often gets you to a partial erection and relies on arousal for the rest. Several forum users panicked on their first dose, thinking the drug had failed, when they got "50 percent" and no more (FrankTalk: Invicorp & Caverject question). That's expected behavior, not a dud. This is the opposite of trimix, which works with or without arousal, as members describe in our How To Inject Trimix guide. If you try Invicorp, know this going in.
It's not risk-free
The gentle reputation can be misleading, because individual response varies a lot. One user's very first injection, at half the standard dose, gave him a 4-hour erection and a genuine priapism scare. That's the argument for starting low and having your urologist's number and your ER plan written down before your first at-home injection. Any erection past 4 hours is an emergency: go to the ER, and tell them you used a penile injection.
Some users also report the effect fading over months and start pushing the dose up well past a single ampoule to compensate (FrankTalk: injections losing efficacy). That's off-label and risky. The usual forum debate applies: it may be dose creep, or it may be the underlying ED progressing rather than the drug weakening. The same "start low, go slow" priapism protocol our members follow for trimix applies here, and you'll find the full version in the founding Trimix thread.
Where you can actually get it
This is where US members hit a wall. Invicorp is not FDA-approved in the United States and can't be obtained through legal US channels. It's licensed and prescription-only in the UK, Ireland, the Nordic countries (Sweden, Denmark, Finland, Norway), New Zealand, and France (though France doesn't reimburse it). In the UK it's typically "specialist-initiated," meaning a hospital urologist starts you on it and trains you before your GP takes over prescribing.
For US men, the practical equivalent isn't Invicorp. It's compounded trimix or bimix from a compounding pharmacy, or FDA-approved alprostadil (Caverject, Edex). The aviptadil-plus-phentolamine combination specifically isn't available here as a finished product. Supply of Invicorp itself is also inconsistent even where it's licensed; it goes out of stock periodically, which pushes men toward compounded options anyway.
Bottom line
For men who found alprostadil too painful, Invicorp is a real option where it's available, mostly Europe and New Zealand. It trades the pain of prostaglandin for a milder injection that leans on arousal to finish the job. If you're in the US, it's worth understanding for context, but trimix or bimix from a good compounding pharmacy is the route you'll actually use. Start with our real-world Trimix guide if that's where you're headed.
The reports above are anecdotal accounts from ED forums, not clinical data, and men posting them are often self-adjusting doses beyond the label. This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting or modifying any treatment.
