I took a sulfa drug for the condition of ulcerative colitis and I was allergic to it. My throat swelled, a rash all over my body, my lips swelled and I was vomiting. I have been looking for a vitamin I can take that does not include iron. I have tried many vitamins like One A day Women's, a lot of different prenatal vitamins etc. What vitamins can I take now that would not make me sick?