I tried the ones with Houdia (sp?) in it. Didn't kill my appetite--didn't even CURB my appetite. But I was treated to 48 hours of NOT sleeping. I was so wound up, I thought I was going to die! My heart was pounding, I was jittery, and my eyes were WIDE OPEN. And I only took 1/2 the recommended dose!! Thank God I didn't take the full dose--I'd be typing this from my grave!!