Ok, so you're using 2 drugs and it equals 4ml total which is more than your 3ml pin will hold...do you:
a. Mix them into 2 equal amounts of each drug and inject on different days?
b. Inject them seperately on the same day?
c. Inject them seperately on different days?
d. Buy 5ml pins and get in all at once?
e. Other?
What is best if one is and why.