Hi, Thanks for writing your query. It will be more helpful if you mentiin the name of the medicines you have taken. After reading your post, I would like to advise that you should take a probiotic. Antibiotic usually disturb the normal bacterial flora present in the intestines which help in the process of digestion and absorption. Taking probiotics helps in restoration of the useful bacterial flora. I would also advise that you should get yourself clinically examined and investigated to know the cause of blood in stool. You should get your stool examined for any infection or parasitic infestation. Further medical management can be planned after knowing the reports of the stool examination. I hope this is helpful to you. Thanks.