I'm using edex. I guess my question is: if I use .50 of the 40mcg is that equal to the 1.0 at 20mcg? I ask this because he said to start at .50 of the 40mcg, and move up as needed. Should I start at .25 of 40mcg? What's egual to a full vial of 20mcg? I don't want to start low and waste it or high an...

I started off at 10mcg used all no help. Used 20mcg full unit 1.0 erect for 5 minutes. Doctor gave me 40mcg.
He said start at .55-.60 is that to much? He said a full vial or 20mcg equals .50 of a 40mcg. Please help don't want to end up in ER.