Im on Adipex & have been for a little over 2 months. I have experienced some side effects like shakiness, headaches, sweating, heart fluttering. While most of those have stopped, new side effects have started, like extreme headaches that turn to migraines, nausea, dizziness. While I cant be sure these are side effects, being that ive been on it for a while, they are known side effects of the medicine