stronger, weaker or same injections over time

[newbie1]

Do most of injectors over time require more units/stronger prescription, less units/weaker prescription, or, same, since first started after stabilized on injections? (noting it may change occasionally for a couple of times but we are talking generally overall).

[rahod1]

After almost a year, no change in the unit range I use(12-17) using same formula. I will be trying a slightly stronger one
soon (not used yet..in the freezer) to see if I can cut back on units a bit (9-12).

[wgs743]

I have had erratic results over past 16 months 0n Trimix. I have gone as low as 11 units and am now using 19. Only thing that I have found is that if I inject it several times over a week or so, I need to use a little less each time. If I don't cut back, erections may take 5 hours to go completely soft.