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Isoniazid and Upset Stomach: What Users Say

Upset stomach: mentioned by 3 users (10.7%)

Based on user experiences from 28 Isoniazid reviews, the following table shows the most commonly mentioned side effects.

All user comments are moderated by Drugs.com. Each review is verified for relevance and screened for inappropriate content. Side effects are user-reported and not clinically verified.

anxiety 17.9%
diarrhea 17.9%
liver damage 17.9%
nausea 17.9%
moody 14.3%
fatigue 10.7%
stomach pain 10.7%
upset stomach 10.7%

Reviews for Isoniazid

Showing 3 reviews tagged with "upset stomach". Clear filters to view all 28 reviews.
Commonly mentioned side effects
  • mol...
  • Taken for 1 to 6 months
  • April 6, 2017

For Tuberculosis, Latent "I was given Isoniazid 300 mg and Pyridoxine 25 mg to be taken daily. My liver enzymes rose as predicted by my doctor, but I was assured they would return to normal after treatment stopped. I took the medication for four months. Never touched any alcohol and stayed clear of any foods listed that might cause side effects. I had a few instances of severe stomach cramps (similar to the pain experienced with gastroenteritis) and was so weak I almost collapsed. I felt unwell most of the time and decided to stop taking the meds after four months. Six months have now passed, my liver has returned to normal, but my doctor has advised me to begin the treatment again for five more months. I am undecided as to if I should or not."

3 / 10
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18 Report
  • Anonymous
  • March 15, 2012

For Tuberculosis, Active "I have just started the medicines for TB, and already I'm not well. The rifampin gave me a major allergic reaction and had to be stopped. Now on isoniazid, pyrazinamide, and ethambutol, and vitamin B6-major stomach problems and diarrhea."

2 / 10
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17 Report
  • Ste...
  • Taken for 1 to 6 months
  • August 27, 2022

For Tuberculosis, Latent "I’m taking 900 mg of isoniazid and 900 mg of priftin once a week. Just took week 3, and it’s kicking my butt. Bad, bad, bad headache, upset stomach, diarrhea, throwing up, lightheaded/dizzy. Even passed out in my bathroom. I am not looking forward to the next 9 weeks. Not sure the risks of the drugs are worth it. Latent TB can sit dormant your whole life. I sure hope these symptoms ease up."

8 / 10
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2 Report

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