i was trying to cut down on injections and doing primo 2X per week. so i would jam 3CC's in 1 injection and 2 CC's in another. didn't go over well at all.. i would get on the ground in agony after each injection and i needed someone to help me inject cause the oil is so damn thick that i needed someone to push the plunger for me.. the PIP lasts about 3 days and gradually goes away. it sucks bigtime.