I was shooting winny and b-12 in the same syringe one time and I got into a vein. I aspirated and either I didn't see the blood for the b-12 or I moved the syringe a little. Anyway, it hurt like a mother _______! I have a pretty high pain tolerance and I couldn't stand it. I went to the ER and got some pain meds. After about 36 hrs the pain went away completely. When I first did it, I could almost tell immidiately, my right leg started feeling kind of numb. It was a very strange feeling. Anyway, I my veins started turning blue and it looked like a rash from my knee up to about the middle of my back. It even itched a little. I thought I was having an alergic re-action but it wasn't. The itching I believe stimulated from the heat I felt. I could not sleep all night, I would keep adjusting my leg and it would only stay comfortable for a minute then it would feel like it was asleep. Finally I had someone drive me 60 miles to the ER where I had to drop my drawers and let 2 lady doctors inspect me. I hate to imagine what it might have felt like if it would have been oil instead of winny. It might not make any difference but it seems like it would. Anyway, moral of the story is be careful. I had been juicing for a good while and it still happened to me. BamBam