Diphen and Suicidal behaviour - a phase IV clinical study of FDA data

Summary:

Suicidal behaviour is reported as a side effect among people who take Diphen (diphenhydramine hydrochloride), especially for people who are female, 50-59 old, have been taking the drug for < 1 month also take Tylenol, and have Neurosarcoidosis.

The phase IV clinical study analyzes which people have Suicidal behaviour when taking Diphen. It is created by eHealthMe based on reports of 113,958 people who have side effects when taking Diphen from the FDA, and is updated regularly.

What is Diphen?

Diphen has active ingredients of diphenhydramine hydrochloride. It is often used in insomnia. eHealthMe is studying from 115,429 Diphen users. Check the latest studies of Diphen.

What is Suicidal behaviour?

Suicidal behaviour is found to be associated with 505 drugs and 506 conditions by eHealthMe. Check the latest studies of Suicidal behaviour.

On Oct, 25, 2025

113,958 people reported to have side effects when taking Diphen.
Among them, 16 people (0.01%) have Suicidal behaviour.

Among these 16 people:

How long have people been on Diphen when they have Suicidal behaviour? *

What is the gender of people who have Suicidal behaviour when taking Diphen? *

female: 84.62 %
male: 15.38 %

What is the age of people who have Suicidal behaviour when taking Diphen? *

What are other drugs people take besides Diphen? *

What are other side effects people have besides Suicidal behaviour? *

High Blood Pressure: 9 people, 56.25%
Fatigue (feeling of tiredness): 8 people, 50.00%
Infusion Related Reaction: 7 people, 43.75%
Weight Decreased: 7 people, 43.75%
Throat Irritation: 7 people, 43.75%
Night Sweats (sweating in night): 7 people, 43.75%
Neurosarcoidosis (a condition of unknown cause featuring a collection of immune cells in various tissues, involving the central nervous system (brain and spinal cord)): 7 people, 43.75%
Neuralgia (pain in one or more nerves): 7 people, 43.75%
Hypoaesthesia (reduced sense of touch or sensation): 7 people, 43.75%
Appetite - Decreased (decreased appetite occurs when you have a reduced desire to eat): 5 people, 31.25%

What are the existing conditions these people have? *

Neurosarcoidosis (a condition of unknown cause featuring a collection of immune cells in various tissues, involving the central nervous system (brain and spinal cord)): 7 people, 43.75%
Rashes (redness): 2 people, 12.50%
Menopause (end of monthly cycles in women): 2 people, 12.50%
Infusion Related Reaction: 2 people, 12.50%
Drowsiness: 2 people, 12.50%
Tardive Dyskinesia (a disorder that involves involuntary movements): 1 person, 6.25%
Suicidal Ideation: 1 person, 6.25%
Stress And Anxiety: 1 person, 6.25%
Pain: 1 person, 6.25%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 1 person, 6.25%

* Approximation only. Some reports may have incomplete information.

Do you take Diphen and have Suicidal behaviour?

- Check whether Suicidal behaviour 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 Diphen:

Diphen (115,429 reports)

Browse all side effects of Diphen:

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 Suicidal behaviour:

Suicidal behaviour (505 drugs)

Browse all the conditions that are associated with Suicidal behaviour:

Suicidal behaviour (506 conditions)

Drugs similar to Diphen and Suicidal behaviour :

How the study uses the data?

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