Tylenol and Mean cell haemoglobin increased - a phase IV clinical study of FDA data

Summary:

Mean cell haemoglobin increased is reported as a side effect among people who take Tylenol (acetaminophen), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Benadryl, and have Relapsing-remitting multiple sclerosis.

The phase IV clinical study analyzes which people have Mean cell haemoglobin increased when taking Tylenol. It is created by eHealthMe based on reports of 217,809 people who have side effects when taking Tylenol from the FDA, and is updated regularly.

What is Tylenol?

Tylenol has active ingredients of acetaminophen. It is often used in pain. eHealthMe is studying from 222,310 Tylenol users. Check the latest studies of Tylenol.

What is Mean cell haemoglobin increased?

Mean cell haemoglobin increased (more than normal haemoglobin per red blood cell in a sample of blood) is found to be associated with 308 drugs and 366 conditions by eHealthMe. Check the latest studies of Mean cell haemoglobin increased.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 31, 2026

217,809 people reported to have side effects when taking Tylenol.
Among them, 91 people (0.04%) have Mean cell haemoglobin increased.

Could Tylenol cause Mean cell haemoglobin increased?

Among these 91 people:

How long have people been on Tylenol when they have Mean cell haemoglobin increased? *

What is the gender of people who have Mean cell haemoglobin increased when taking Tylenol? *

female: 61.25 %
male: 38.75 %

What is the age of people who have Mean cell haemoglobin increased when taking Tylenol? *

What are other drugs people take besides Tylenol? *

What are other side effects people have besides Mean cell haemoglobin increased? *

Red Blood Cell Count Decreased: 62 people, 68.13%
Mean Cell Volume Increased (more than normal average red blood cell volume): 61 people, 67.03%
Lymphocyte Count Decreased: 51 people, 56.04%
Haematocrit Decreased: 39 people, 42.86%
White Blood Cell Count Decreased: 39 people, 42.86%
Thrombocytopenia (decrease of platelets in blood): 37 people, 40.66%
Fatigue (feeling of tiredness): 37 people, 40.66%
Haemoglobin Decreased: 36 people, 39.56%
Dizziness: 35 people, 38.46%
Nausea (feeling of having an urge to vomit): 33 people, 36.26%

What are the existing conditions these people have? *

Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 28 people, 30.77%
Glioblastoma (most common and most aggressive malignant primary brain tumour in humans): 13 people, 14.29%
Stress And Anxiety: 10 people, 10.99%
Insomnia (sleeplessness): 8 people, 8.79%
Nausea (feeling of having an urge to vomit): 8 people, 8.79%
Limb Discomfort (discomfort in leg): 7 people, 7.69%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 7 people, 7.69%
Multiple Myeloma (cancer of the plasma cells): 7 people, 7.69%
Fever: 6 people, 6.59%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 6 people, 6.59%

* Approximation only. Some reports may have incomplete information.

Do you take Tylenol and have Mean cell haemoglobin increased?

- Check whether Mean cell haemoglobin increased is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Tylenol:

Tylenol (222,310 reports)

Browse all side effects of Tylenol:

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

Browse all the drugs that are associated with Mean cell haemoglobin increased:

Mean cell haemoglobin increased (308 drugs)

Browse all the conditions that are associated with Mean cell haemoglobin increased:

Mean cell haemoglobin increased (366 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on acetaminophen (the active ingredients of Tylenol) and Tylenol (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.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML 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 800+ peer-reviewed 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, DISCLAIMER, USE FOR PUBLICATION

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 eHealthMe.com 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.