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Promethazine and Fempatch drug interactions - a phase IV clinical study of FDA data

Summary:

We study 32,317 people who take Promethazine (promethazine hydrochloride) and Fempatch (estradiol). There is no drug interaction reported.

The study analyzes what interactions people have when they take Promethazine and Fempatch. It is created by eHealthMe based on reports the from the FDA, and is updated regularly.

What is Promethazine?

Promethazine has active ingredients of promethazine hydrochloride. It is often used in nausea. eHealthMe is studying from 32,300 Promethazine users. Check the latest studies of Promethazine.

What is Fempatch?

Fempatch has active ingredients of estradiol. eHealthMe is studying from 17 Fempatch users. Check the latest studies of Fempatch.

On Jun, 02, 2026

No report is found.

Do you take Promethazine and Fempatch?

- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, side effects of, and alternative drugs to the 2 drugs:

Related publications that referenced our studies

How the study uses the data?

The study uses data from the FDA. It is based on promethazine hydrochloride and estradiol (the active ingredients of Promethazine and Fempatch, respectively), and Promethazine and Fempatch (the brand names). 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.

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