diet pills prescription

I am currently in a cutting mode on a reduced calorie diet. I just purchased some pure Ephedrine HCL to rotate with Phentermine (a prescription diet pill). My body was getting used to the Phentermine thus the switch. I am planning on using the Ephedrine for a period of at least 30 days. OKAY NOW HERE IS MY QUESTION/PROBLEM. Number one, I am using the Ephedrine strictly as an appetite suppressant and am not overly concerned with the thermogenic effect. Number two, I am also using Kre-Alkalyn creatine daily to keep my muscles "full" while I diet down. Apparently Caffeine can have a negative impact on creatine absorption. Number three, I cannot have overly shaky hands at my place of work. These three points have led me to the conclusion that I will use the Ephedrine by itself without the addition of Caffeine. Has anyone here had any success with Ephedrine as a stand alone supplement? Any problems?