I still shake huge and I have been an ER nurse for 2 years. it is just a part of who I am. Am able to start IV's on the big and small, but the shaking really has nothing to do with nerves or caffeine. Just has to do with who I am and how God and Jesus made me. Have never had a problem with it, but the other day started and IV on a woman in SVT and she asked me if i was nervous for her told her no I just shake>>>>>>>