I have never used HCG Before, thursday will be my last Shot of sust/primo/fina cycle (best results I ever had) and my doctor who gave me the HCG said to mix the liquid in the 1st vial with the tabs in the other vial. What I was wondering about was do I mix the liquid in the HCG the day of my 1st shot or like a week before? and the doctor said to do my HCG 1 weeek after my last sust shot, 1cc every otherday, hes a sports doc that sells me my gear.