Hello doctor I am very health conscious and try to be eat balanced diet and I am also taking protein shake and multivitamin capsule since last 6 months. But last 4-5 days I have passing black tarry lose stool 3-4 times in a day with very foul smell. Im taking Tab. Norflox TZ with metrogyl 400 can I continue with this. Aur something else And what was the cause behind that please elaborate it And suggest me some effective medicine .Thank you.