There is good news there, although you might not think so -- at least you know that bimix will work well for you. Now the trick is to refine your techniques and reduce the dosage.
My uro has an "ED Clinic" as part of his practice, and I after excellent first impressions, also discovered that the nurse who looks after the injections is far from expert in this area. I rather suspect that your experience is fairly normal.
For bimix, 0.5ml is not a huge first dose. My first dose was 0.3ml, but they gave me six syringes with doses all the way up to 2.0ml. However there can be huge variables:
1. We all vary greatly in in how we respond.
2. Exactly where you inject has a large bearing on the response -- I think! My theory is that if you happen to inject near near an outflow vein, the drug is swept away before it does much good. Conversely if you are far from such a vein, the drug will have maximum effect. As we should be varying the placement of the injections, it's a crap-shoot what the effects will be for any particular injection.
My this reason, I am a strong advocate of constriction around the base of the penis at the time of the injection and for a few minutes after -- this forces the drug to hang around while it does it's magic. In the absence of anything better, I find a few office rubber bands doubled over work fine. That single change has given me 100% reliability -- prior to that my results were very erratic, and early on, I had a string of six failures.
Another technique that others here advocate is a pre-plumping technique -- pump up a little before-hand. I tried this once, and it did nothing for me -- but it helps others and may help you too.
To answer your specific issues/questions:
1. The oncall doc was wrong -- you are a bimix candidate. What you now need to is to find the dose and injection techniques that work for you. In this regard, don't confuse recommended trimix dosage with bimix. Trimix is much more potent. Based on my experiences, I suggest start with 0.1ml (cc) bimix and work up from there. With constriction, I am on 0.2ml of bimix, which is a low dose for bimix.
2. There is no need to keep bimix refrigerated but I do -- if nothing else, it discourages bugs from growing. Although bimix has a nominal shelf-life of three months, my last batch has run 9 months and is still going strong.
3. I agree -- your uro's office was very slack. Demonstration/instruction on the first injection, instruction sheets, discussion of what to do in the event of priapism (a common risk) are the minimum we should expect. Your call on whether you stick with him, but first ask yourself this: will the next one be any better?
