Doc used 5/8 inch, 25 gauge needle for my first injection - ouch!!!
I have been using 5/16 inch, 31 gauge needles in an autoinjector with mixed results....the autoinjector shortens the needle slight, so probably only 4/16 is being inserted. Sometimes that has worked fine....other times I have missed the mark....definite pressure against the plunger indicating the needle is not in the targeted open cavity.
Going to try 1/2 inch needle and a 1/8 inch spacer on the autoinjector, to sort of split the difference in length, and see if I have more consistent (and better) results.
Curious about what size needles most use here for penile injections?