Today I donated blood. There was not one question about having Crohns! Please DO NOT make the mistake I made. I have been very sick all day. I passed out 3x, my blood pressure dropped so low that my husband almost called 911. I have diarrhea with blood all day with cramps. I take Lialda every day and my Crohn's has been completely under control--until today. Please, don't do it!!!!!