Hi this message is for Fred. He had a question or 2 about trimix. He had his operation on Sept. 18th 2008 . I had mine on Sept. 15 th 2008 Anyway about trimix. I get mine from Shoppers Drug Mart here in the Halifax Infirmary Hospital. They make it there and it costs me only $67.00 for 4 MLs The nurse who helped me on getting started on Trimix told me to use 10 cc first to see how it worked for a erection. Anyway ask your doctor or prostate doctor about it ok. Hope this is helpful to you and others. Garry in Nova Scotia.