What you can expect is exactly what you can imagine. In my case I met with my surgeon's PA who handles all of the penile injections for this university based urologoc surgical clinic. The PA came into the exam room and asked some basic questions about where I was at with ED and what my experience was before surgery which was good. The he began discussing the three types of medications, Caverjet, Bimix and Trimix. He told me that he wanted to start with Caverjet because it had a reputation for lower complications with priapism and Peyronies. The he went out and came back with the injection. The injection itself was not bad at all as the needle is an insulin type of needle. What you have to be prepared for is to watch him give the injection so you kow what to do. He stuck it in and then pulled it out a little until he got some blood and then pushed the plunger slowly. He then left and said that he would be back in 15 minutes to judge the results. Almost immediatley I began to get an erection but I also had some pain along the length on my penis and on the top. He came back in about 10 minutes and felt my penis and said that it was about 70% erection. He noticed that I was pale and said that the Caverjet can make your blood pressure fall. Aftre lying donw for a few minutes I was okay. I then left the office and got in the car. The erection conitnued to get harder and the pain grew to the uncomfortable but bearable level. It was a two hour drive back home and the erection did not start going down until I got home. I continued to have penile aching for the next three weeks. I talked to the clinic and they then prescribed Bimix which I have not tried yet but probably will shortly.
In the research I have done the Trimix is better for the pain then the other two. You might want to take some ibuprofin or something prior to the appointment. They will start you on a minimum dose and see what the response is and then they will tell you what to try the next time. I too do not like what I am getting with Viagra and the pump but it has only been about five months since my surgery.
My surgeon told me that they have hundreds of men on injections. I am not sure how to take that. You can look at it and say that most men can handle the injections or you can consider that like you a lot of the men are not getting their natural erections back and this is what they have to do.
I am very interested in what your results are so please post them once you have had the injections.