Did they not give you instructions on the dose, or are they expecting you to come back? All of that should be told to you by the doctor. If you have questions, call the doctor and ask for clarification. If you are moving from Caverject to Trimix, I would expect that you would go back for another check injection.
I have no idea what a "Boston Medical" formula is composed of, but the pharmacy should at least be able to tell you the mix. It should be on your vial labels.
Moderator - Prostate Cancer(Not a medical professional)
My adjuvant IGRT journey (2010) - www.healingwell.com/community/default.aspx?f=35&m=1756808
HT (Lupron) 6-mo injection 9/12;Prolia 6-mo inj 12/12