Hello! I have been having a Brown mucus discharge for over two weeks now. I started taking Phentermine to help with some stubborn weight gain caused by Hashimoto's Thyroiditus and have recently been diagnosed with Crohn's (that's two autoimmune diseases in one year). I called my doc and he said that discharge is not a common side effect for Phentermine but didn't seem concerned, even when I pointed out that it started the DAY after I started the new med. I took a pregnancy test and it was negative. I've had some cramping, a few times had enough to make me since but it's not constant. I'm not sure if I should be worried or not. Any thoughts?