I think there is some confusion regarding unit of volume vis a vis Trimix
The urologists don't have any idea. They start you with way too much because they are ignorant. I do 1.0 and get hard for 3 hours. Don't trust your stupid doctor. Do your own research.
I am 66 and a regular user of Trimix, and I am appalled by the lack of precision with regard to dosage
recommended or being used. People throw numbers around that will get some one hurt
if you use a standard insulin syringe, the capacity is 1/2 milliliter or .5 (that's point 5 cc !).
I am pretty sensitive. My first "test" shot at the urologist put me in the ER about 6 hours later.
a dose of .07 cc (not even to the first .1) will generally give a penetration grade erection that does not last more than an hour, and is nice if you have plans later on and don't care to deal with a boner in public.
Raising the dose to .09 to .1 will generally result in a 3+ hours erection, and let's hope your partner's junk is up to the task. I am sure others have significantly different requirements, but for Pete's sake
start slow, when sober and thinking clearly, you only have one (already malfunctioning) **** !
Point is, in my case, the syringe is never more than 20 percent full. I would never let an amateur do the injection, you must avoid the big veins under the skin, and if you don't compress the area for at least a minute, you run the risk of a ugly bleed under the skin.
Just make sure you understand the units involved, please !