Most people go from smoking to e cigs but I went from not smoking to e cigs and have been doing it for 3 weeks. I am using strictly 12 mg juices from multiple venders with a pg/vg mix about 80/20. Now when I do it, I get light headed and dizzy, no chest pains or heart palps. I am considering stopping. I considered lowering to 6 mg but would have to re-buy everything. I don't know. I enjoy it but not the dizziness. I try to do it less but two or three hits is just not satisfying.