Chlorzoxazone and Gastric ulcer - a phase IV clinical study of FDA data


Gastric ulcer is found among people who take Chlorzoxazone, especially for people who are male, 40-49 old.

The phase IV clinical study analyzes which people take Chlorzoxazone and have Gastric ulcer. It is created by eHealthMe based on reports of 1,544 people who have side effects when taking Chlorzoxazone from the FDA, and is updated regularly. You can use the study as a second opinion to make health care decisions.

Phase IV trials are used to detect adverse drug outcomes and monitor drug effectiveness in the real world. With medical big data and AI algorithms, eHealthMe is running millions of phase IV trials and makes the results available to the public. Our original studies have been referenced on 600+ medical publications including The Lancet, Mayo Clinic Proceedings, and Nature.

On Nov, 30, 2022

1,544 people reported to have side effects when taking Chlorzoxazone.
Among them, 12 people (0.78%) have Gastric ulcer.

What is Chlorzoxazone?

Chlorzoxazone has active ingredients of chlorzoxazone. It is often used in muscle spasms. eHealthMe is studying from 1,631 Chlorzoxazone users for its effectiveness, alternative drugs and more.

What is Gastric ulcer?

Gastric ulcer (stomach ulcer) is found to be associated with 3,336 drugs and 3,132 conditions by eHealthMe.

Number of Chlorzoxazone and Gastric ulcer reports submitted per year:

Could Chlorzoxazone cause Gastric ulcer?

Gender of people who have Gastric ulcer when taking Chlorzoxazone *:

  • female: 36.36 %
  • male: 63.64 %

Age of people who have Gastric ulcer when taking Chlorzoxazone *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 0.0 %
  • 40-49: 66.67 %
  • 50-59: 0.0 %
  • 60+: 33.33 %

Common drugs people take besides Chlorzoxazone *:

  1. Phenylbutazone: 6 people, 50.00%
  2. Cimetidine: 6 people, 50.00%
  3. Diclofenac: 5 people, 41.67%
  4. Theophylline: 5 people, 41.67%
  5. Paracetamol: 4 people, 33.33%
  6. Omeprazole: 2 people, 16.67%
  7. Diovan: 2 people, 16.67%
  8. Dilaudid: 2 people, 16.67%
  9. Lortab: 2 people, 16.67%
  10. Lyrica: 2 people, 16.67%

Common side effects people have besides Gastric ulcer *:

  1. Renal Impairment (severely reduced kidney function): 6 people, 50.00%
  2. Secondary Adrenocortical Insufficiency (inadequate secretion of acth by the pituitary gland): 5 people, 41.67%
  3. Joint Swelling: 2 people, 16.67%
  4. Acute Kidney Failure: 2 people, 16.67%
  5. Joint Pain: 2 people, 16.67%
  6. Rashes (redness): 2 people, 16.67%
  7. Chest Pain: 2 people, 16.67%
  8. Haemorrhoids (a swollen vein or group of veins in the region of the anus): 1 person, 8.33%
  9. Gait Disturbance: 1 person, 8.33%
  10. Gallstones (stone formation by bile component): 1 person, 8.33%

Common conditions people have *:

  1. Pain: 4 people, 33.33%
  2. Diabetes: 2 people, 16.67%
  3. Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 1 person, 8.33%
  4. Orthostatic Hypotension (a medical condition consisting of a sudden decrease in blood pressure when a person stands up): 1 person, 8.33%
  5. Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 1 person, 8.33%
  6. Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 1 person, 8.33%
  7. Metastatic Neoplasm (spreadable cancer tumour): 1 person, 8.33%
  8. Metastases To Bone (cancer spreads to bone): 1 person, 8.33%
  9. Hypersensitivity: 1 person, 8.33%
  10. High Blood Pressure: 1 person, 8.33%

* Approximation only. Some reports may have incomplete information.

Do you take Chlorzoxazone and have Gastric ulcer?

Check whether Gastric ulcer is associated with a drug or a condition

How to use the study?

You can discuss the study with your doctor, to ensure that all drug risks and benefits are fully discussed and understood.

Related studies

How severe was Gastric ulcer and when was it recovered:

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Alternative drugs to, pros and cons of Chlorzoxazone:

Common Chlorzoxazone side effects:

Browse all side effects of Chlorzoxazone:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Gastric ulcer treatments and more:

COVID vaccines that are related to Gastric ulcer:

Common drugs associated with Gastric ulcer:

All the drugs that are associated with Gastric ulcer:

Common conditions associated with Gastric ulcer:

All the conditions that are associated with Gastric ulcer:

How the study uses the data?

The study uses data from the FDA. It is based on chlorzoxazone (the active ingredients of Chlorzoxazone) and Chlorzoxazone (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

Who is eHealthMe?

With medical big data and proven AI algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 600+ medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).


WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.

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