Benadryl and Anorexia nervosa - a phase IV clinical study of FDA data

Summary:

Anorexia nervosa is reported as a side effect among people who take Benadryl (diphenhydramine hydrochloride), especially for people who are female, 30-39 old, also take Prevacid, and have Osteoporosis.

The phase IV clinical study analyzes which people have Anorexia nervosa when taking Benadryl. It is created by eHealthMe based on reports of 100,139 people who have side effects when taking Benadryl from the FDA, and is updated regularly.

What is Benadryl?

Benadryl has active ingredients of diphenhydramine hydrochloride. It is often used in allergies. eHealthMe is studying from 104,954 Benadryl users. Check the latest studies of Benadryl.

What is Anorexia nervosa?

Anorexia nervosa (psychological disorder-eating disorder characterized by immoderate food restriction and irrational fear of gaining weight) is found to be associated with 55 drugs and 289 conditions by eHealthMe. Check the latest studies of Anorexia nervosa.

On Jul, 13, 2026

100,139 people reported to have side effects when taking Benadryl.
Among them, 17 people (0.02%) have Anorexia nervosa.

Among these 17 people:

What is the gender of people who have Anorexia nervosa when taking Benadryl? *

female: 100 %
male: 0.0 %

What is the age of people who have Anorexia nervosa when taking Benadryl? *

What are other drugs people take besides Benadryl? *

What are other side effects people have besides Anorexia nervosa? *

Stress And Anxiety: 17 people, 100.00%
Depression: 17 people, 100.00%
Jaundice - Yellow Skin (a yellowish pigmentation of the skin): 16 people, 94.12%
Hypovolaemia (a decreased volume of circulating blood in the body): 16 people, 94.12%
Impaired Gastric Emptying: 16 people, 94.12%
Injury: 16 people, 94.12%
Intervertebral Disc Degeneration (spinal disc degeneration): 16 people, 94.12%
Disability: 16 people, 94.12%
Intervertebral Disc Protrusion (spinal disc protrusion): 16 people, 94.12%
Immunodeficiency: 16 people, 94.12%

What are the existing conditions these people have? *

Osteoporosis (bones weak and more likely to break): 16 people, 94.12%
Sinus Disorder (disease of sinus): 1 person, 5.88%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 1 person, 5.88%

* Approximation only. Some reports may have incomplete information.

Do you take Benadryl and have Anorexia nervosa?

- Check whether Anorexia nervosa is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

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

Benadryl (104,954 reports)

Browse all side effects of Benadryl:

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 Anorexia nervosa:

Anorexia nervosa (55 drugs)

Browse all the conditions that are associated with Anorexia nervosa:

Anorexia nervosa (289 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on diphenhydramine hydrochloride (the active ingredients of Benadryl) and Benadryl (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.