trimix use

I have been using trimix for over 9 years and i have for the longest time used the lowest strength and a low dosage but in the last 1.5 years i have had to dramatically increase the the strength and the dosage…i am starting to worry

I have used my trimix a few times working to find the right dose, at 3 IU I get priapism and have had it very painful for up to 6 hours. any less than this dose it doesn't work at all. Anyone have this issue or have any advice?