I understand that "BiMix" means a combination without Alprostadil because of the ache it can cause.
But what about a mix without Papaverine so the duration of effect is shorter? It would often be nice to be able to dose more strongly but have it subside more quickly so one can move on after doing the deed.
Looking at the half lives, it is apparent that Papaverine is the culprit in terms of duration:
Alprostadil 10 min
Phentolamine 20 min
Papaverine HCL 1-2 hours
Why does no one make a BiMix with just Alprostadil and Phentolamine?
Shortest Duration Mix
-
- Posts: 52
- Joined: Mon Aug 14, 2023 11:10 am
Shortest Duration Mix
Oct 7, 2025 - Coloplast Titan XL - Touch pump - 26cm - 0.5cm RTE with Jonathan Clavell. Still sorting out TRT; plan to try a "modified natty" approach without injections.
-
- Posts: 1308
- Joined: Sun Jun 16, 2019 1:07 pm
Re: Shortest Duration Mix
edjohn wrote:
Why does no one make a BiMix with just Alprostadil and Phentolamine?
A real compounding pharmacy can make that. If your doc is onboard with this idea have them write the script and a true compounding pharmacy can make it. I use AmericareCompounding In Long Island City (NYC) and they make the mix just as my doctor orders.
In my case it’s Papaverine, Phentolomine, and Atropine. (So BiMix + Atropine, or QuadMix without Prostaglandins, or just a different TriMix).

57yo, NYC. ED started at 40. Pills, then shots for 10 years. 24cm Coloplast Titan XL w/classic pump by Dr Eid 3/25/2025. Will meet for show & tell.
Implant journal: [url] viewtopic.php?f=6&t=26225[/url]
Implant journal: [url] viewtopic.php?f=6&t=26225[/url]
-
- Posts: 52
- Joined: Mon Aug 14, 2023 11:10 am
Re: Shortest Duration Mix
Did you notice a big difference when you added atropine?
Oct 7, 2025 - Coloplast Titan XL - Touch pump - 26cm - 0.5cm RTE with Jonathan Clavell. Still sorting out TRT; plan to try a "modified natty" approach without injections.
-
- Posts: 1308
- Joined: Sun Jun 16, 2019 1:07 pm
Re: Shortest Duration Mix
edjohn wrote:Did you notice a big difference when you added atropine?
I had been on the typical TriMix (Papaverine, Phentolomine, and prostaglandins) near the top of the concentration mix when atropine was added. That is what people typically refer to as “QuadMix”. Atropine definitely added a boost.
The ache of prostaglandins was getting in the way of me enjoying sex so we eliminated that from my mix and that’s been much better for me. That’s how I’ve ended up with the mix I currently have.
57yo, NYC. ED started at 40. Pills, then shots for 10 years. 24cm Coloplast Titan XL w/classic pump by Dr Eid 3/25/2025. Will meet for show & tell.
Implant journal: [url] viewtopic.php?f=6&t=26225[/url]
Implant journal: [url] viewtopic.php?f=6&t=26225[/url]
-
- Posts: 52
- Joined: Mon Aug 14, 2023 11:10 am
Re: Shortest Duration Mix
Interesting. Atropine has a half life longer than any of the others, so I can only imagine your mix lasting all day if you wanted it to. It is worth considering an alternative to PGE1 though. Sometimes the ache is arousing in its own way, but sometimes it's just annoying.
Oct 7, 2025 - Coloplast Titan XL - Touch pump - 26cm - 0.5cm RTE with Jonathan Clavell. Still sorting out TRT; plan to try a "modified natty" approach without injections.
Who is online
Users browsing this forum: ClaudeBot and 23 guests