Hello, I ve recently been prescribed 4ml of vyvance. I drink a lot of water, I do sit most of the day at work. Since taking the med my right ankle and foot is swollen when I get home. BP has always been normal, no other meds or issues. Do you think it s the essesive water, or the is it because I m not up walking enough? If it s the med, will the side effect subside in time, if so how long ?