Someone else made the below comments which are pretty comprehensive. Maybe the original poster can take responsibility.

I've been using Trimix for about six months with outstanding results. It did take some experimentation to figure out the best way to make it work for me. With hopes that it may help others, here's what I discovered using this medication: (BTW, I'm 71, one year post SBRT and 4 months Orgovyx)
- I have had to use the oral antidote several times (works well) in the early dose experimentation days for super hard erections lasting more than three hours (4tablets of 30 mg pseudoephedrine. Don't make the mistake of buying the extended release pseudoephedrine tabs). Make sure you have this on hand before you start this medication!
- I had to find the sweet spot for the injection site and depth. For me turns out to be the 10 and 2 o'clock position with the 1/2" needle almost fully inserted around mid-shaft.
- Shelf life on the Trimix in the refrigerator is limited. I can definitely see a difference in the results at the 3-4 week period. For me, it became pretty useless after 4 weeks, even at a higher dose. To help extend the life, I now fill all syringes with the needed dose as soon as I get the medication and immediately place all syringes into the freezer until needed. Now, I take a syringe out about 30 min before needed and it's ready to go. This is working well and my pharmacist said this should extend the shelf-life to 6 months or more.
- After injecting, massage the entire penis and base to help distribute the medication throughout the muscle structure. This will help significantly.
- Stand for the first 5-10 minutes after injection as gravity aids in the blood flow into the penis.
This medication has been a lifesaver for me. I was afraid I'd never see a useful erection again. Now, I'm back to 18 in that regard-- actually better than 18 as my erection stays hard even after an orgasm! Best of luck guys! Be aware that your partner may hide your medication if you use it to often.
Ha ha ha ha ha ha ha ha. (Jeff’s reaction to last comment, after mistakenly turning on the mic)