Pepcid and Lymphocyte count decreased - a phase IV clinical study of FDA data

Summary:

Lymphocyte count decreased is reported as a side effect among people who take Pepcid (famotidine), especially for people who are female, 50-59 old, have been taking the drug for < 1 month also take Tylenol, and have Multiple sclerosis.

The phase IV clinical study analyzes which people have Lymphocyte count decreased when taking Pepcid. It is created by eHealthMe based on reports of 54,527 people who have side effects when taking Pepcid from the FDA, and is updated regularly.

What is Pepcid?

Pepcid has active ingredients of famotidine. It is often used in gastroesophageal reflux disease. eHealthMe is studying from 55,775 Pepcid users. Check the latest studies of Pepcid.

What is Lymphocyte count decreased?

Lymphocyte count decreased is found to be associated with 1,196 drugs and 1,337 conditions by eHealthMe. Check the latest studies of Lymphocyte count decreased.

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 Jul, 03, 2026

54,527 people reported to have side effects when taking Pepcid.
Among them, 89 people (0.16%) have Lymphocyte count decreased.

Could Pepcid cause Lymphocyte count decreased?

Among these 89 people:

How long have people been on Pepcid when they have Lymphocyte count decreased? *

What is the gender of people who have Lymphocyte count decreased when taking Pepcid? *

female: 60.71 %
male: 39.29 %

What is the age of people who have Lymphocyte count decreased when taking Pepcid? *

What are other drugs people take besides Pepcid? *

What are other side effects people have besides Lymphocyte count decreased? *

Thrombocytopenia (decrease of platelets in blood): 33 people, 37.08%
Haemoglobin Decreased: 32 people, 35.96%
Neutrophil Count Increased (excess than normal number of neutrophil a type of blood cell): 28 people, 31.46%
Fatigue (feeling of tiredness): 26 people, 29.21%
Red Blood Cell Count Decreased: 24 people, 26.97%
Haematocrit Decreased: 23 people, 25.84%
Nausea (feeling of having an urge to vomit): 21 people, 23.60%
Oedema Peripheral (superficial swelling): 20 people, 22.47%
Aspartate Aminotransferase Increased: 20 people, 22.47%
High Blood Pressure: 19 people, 21.35%

What are the existing conditions these people have? *

Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 19 people, 21.35%
Pain: 16 people, 17.98%
Constipation: 14 people, 15.73%
Nausea (feeling of having an urge to vomit): 10 people, 11.24%
Stress And Anxiety: 10 people, 11.24%
Dry Skin: 10 people, 11.24%
Depression: 8 people, 8.99%
Fluid Overload (too much fluid in the blood): 8 people, 8.99%
Fatty Acid Deficiency: 8 people, 8.99%
Spinal Muscular Atrophy (wasting of spinal muscles): 8 people, 8.99%

* Approximation only. Some reports may have incomplete information.

Do you take Pepcid and have Lymphocyte count decreased?

- Check whether Lymphocyte count decreased is associated with a drug or a condition
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Related studies:

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

Pepcid (55,775 reports)

Browse all side effects of Pepcid:

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 Lymphocyte count decreased:

Lymphocyte count decreased (1,196 drugs)

Browse all the conditions that are associated with Lymphocyte count decreased:

Lymphocyte count decreased (1,337 conditions)

How the study uses the data?

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