@peterj116 Not sure I can be much help. My urologist is at Mayo. He had his tech show me how to do the injection and I was told to start at 5 units and experiment up to 40 units for the right length of time for the results. Less than 2 hrs. He ordered through a compounding pharmacy in my area. (Strive Pharmacy) and said he ordered medium strength. (?) He also gave me the little bit of the bottle left from the office visit. I am not sure how much in ml is the 5 units? The small bottle does not say on the side how much is in it. It does say 30ml of one drug - 10ml of another - 1ml of the last. Strive charged me $95 for the bottle. The 5 unit injection lasts me about 3 hours. I have not experimented with more or less. The day I picked up the medication I drew about 10 syringes from the Doctors bottle and 10 from the new bottle and put in the freezer. The drug says it has a shelf life in the refrigerator. Ten syringes has barely used any of the bottle. I would say I could get another 15-20 syringes out of this bottle. I would say not bad return on investment. At least 20 party nights for $95. It costs me $10 for a crown and soda water.