 [ Symptoms ] what weight loss pill can you take if you are on tysabri for ms [ Disease ] i am sorry but my answer is none at least not without consulting your physician in general i discourage anyone from using weight loss pills at best they may help get a few pounds off at worst they can cause scary side effects such as an irregular heart beat if you have multiple sclerosis ms and want to lose weight please talk to your health care provider about healthy ways for you to accomplish your goal eating smaller portions of balanced meals and exercising to the extent you are able with your disease can both contribute to reducing your body weight i wish you all the best