I Had Bariatric Surgery In 2011. Since Then I Have

I had bariatric surgery in 2011. Since then I have a bowel movement about 12 times a day and it is the consistency of pudding. Is there anything I can take to slow this down to a normal rate. I have just been diagnosed with Iron Deficiency Anemia they think this could be part of the cause. I have just had my second IV dose of 200mgs of Venofer for the iron