I have MSD, (mylodisplastic syndrome) and my doctor prescribed hydroxyurea, 500 mg. 1 daily. I am also taking atenolol, atvorstatin, gapepetin. 81 mg aspirin and many B vitamins, plus 75 mg of plavix. I have congestive heart failure, neuropathy, and in Feb. I had a heart attack and a stent was put in the 75% blocked artery. I am concerned about the hydroxyurea as it says on the paper from the pharmacy , used for sickle cell anemia. I also have ulcerative colitis and am taking metamucil capsules which provides bulk. and I get an infusion of Entivyo every 8 weeks for the colitis.