Q. I am passing black stools since two days. Why?

Answered by
Dr. Sadaf Mustafa
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Jul 16, 2018 and last reviewed on: Oct 09, 2018

Hi doctor,

I am passing black stools since two days. I am on medication since four months. The current medication I am taking is Irozorb and Cranbe. Please suggest me what to do.



Welcome to

Iron in Irozorb can make the stools black or it may be happening due to gastritis or stomach ulcers.

It is the iron that oxidizes and give black color, but it seems like you are taking these medications since four months.

  • Did you have black color stools before?
  • Do you have any abdominal pain, nausea or vomiting?
  • Did you increase the dose of Irozorb?

Revert with the answers to the surgical gastroenterologist online -->

Thank you doctor,

I do not have any pain or nausea; however, sometimes I have acidity problems. It has been a week that I have started taking Irozorb.

I was being treated for chronic UTI since three months and my doctor gave me six weeks course for Zovirax 800 mg for HSV1 even when only the IgG was positive.

Does Zovirax make you fat? I have attached my laboratory report for reference.



Welcome back to

  • It seems like the black stools are due to iron in Irozorb. However, it looks like you had low platelet counts as documented before two times, which may indicate slow bleeding (attachment removed to protect patient identity).
  • Why are you taking iron and folic acid supplements in the first place? If it is not an absolute necessity to take Irozorb, then I would suggest stopping it and check by the stool color.
  • Now coming to your second question, if you do not have an active lesion and you have no chances of pregnancy, then using Zovirax (Acyclovir) may not be helpful if you have IgG positive only. Also, it also depends upon how many episodes you had in the past. Zovirax should not make you fat.

For further information consult a surgical gastroenterologist online -->

Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
I seek your advice for my father's blood report. Kindly help.

.. the reports (attachment removed to protect patient identity), he has type 2 diabetes with dyslipidemia and iron deficiency anemia. All these can be managed with lifestyle modifications along with some drugs. I would advise daily brisk walking for ...   Read full

Why is there sore throat, fever, runny nose with black stool?

.. suffering from probably acute viral rhinopharyngitis with black stools. Black stools may be due to GI bleeding or Iron tablets consumption or infection, etc. Until examination is done it is difficult to say what it is. Use water vapor inhalation a...   Read full

I took protein supplements and I passed black stools. Is it because of the protein powder?

Hello doctor, I am a 26 year old female, who has an inflamed looking foliate papillae on right side of the tongue towards the back, it has been like this for more than three weeks now. It has not gotten better or worse, pretty much looks the same. ...   Read full

Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

Managing Diabetes During Festive Season
All the festivals are indirectly a danger sign for diabetic patients. Read this article to know more about how to handle...  Read more»
What You Should Eat and Drink for A Healthy Life!!
Food is essential for our survival, and what we eat definitely impacts our health. We can easily reduce the risk of many...  Read more»
What Is ADHD and How Is It Managed?
This article discusses ADHD, whether it is a real condition, features of ADHD, how to recognize and manage this common c...  Read more»

Ask your health query to a doctor online?

Ask a Surgical Gastroenterologist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.