This was already covered recently in another thread about the strongest acceptable concentration for a tirzepatide vial.
When mixing a 3 ml vial that holds 60 mg of the medication, is using 3 ml of bacteriostatic water the way to go? That would give 20 mg per ml. Some places go to 22 mg per ml, so a little stronger works, but why do others stop at only 15? How high can the concentration safely go?