First of all on the penis head soreness I would check with your URO for that.
I use Trimix at .7ml per injection but my formula is very different.
My next presciption my URO will order double concentration so I only have to inject .35ml which also keeps my cost down.
AGE 61 with fam hist of PC
3.5 12/10 ref URO
5.25 2/11 all DRE Neg
BX 4/13/11 2 of 12 cores diag both sides 15% & 20% GS7(3+4)
RALP nerve-sparing 6/8/11 path G7 pT2C, Marg-Lymph-Sem-Vas NEG, organ confined 60% tumor involved 69grms 4.3X4X3 cm 100% dry 7/1/11
post PSA 8/30/11 <0.07
TRIMIX therapy for ED seeing improvement
Zero club member in good standing