I am researching PDE-5 inhibitors for ED. I have tried Bimix, Trimix with varying results...but the high cost, injection procedure, Trimix ache and the unpredictable results (hit or miss with no rhyme or reason)...is becoming a drag. I am post-op and ADT therapy for Stage 4 Prostate Cancer...so finding something easier to use with more predictable results would help. I can get semi erect on my own...but need a boost. Viagra and Cialis give me heartburn for days and headaches and not always dependable.