Adalat and Melaena - a phase IV clinical study of FDA data

Summary:

Melaena is reported as a side effect among people who take Adalat (nifedipine), especially for people who are male, 60+ old, have been taking the drug for 1 - 2 years also take Lasix, and have Atrial fibrillation/flutter.

The phase IV clinical study analyzes which people have Melaena when taking Adalat. It is created by eHealthMe based on reports of 20,643 people who have side effects when taking Adalat from the FDA, and is updated regularly.

What is Adalat?

Adalat has active ingredients of nifedipine. It is often used in high blood pressure. eHealthMe is studying from 20,940 Adalat users. Check the latest studies of Adalat.

What is Melaena?

Melaena (the passage of black, tarry stools) is found to be associated with 1,322 drugs and 1,475 conditions by eHealthMe. Check the latest studies of Melaena.

On Jul, 15, 2026

20,643 people reported to have side effects when taking Adalat.
Among them, 152 people (0.74%) have Melaena.

Among these 152 people:

* Approximation only. Some reports may have incomplete information.

Do you take Adalat and have Melaena?

- Check whether Melaena 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 Adalat:

Adalat (20,940 reports)

Melaena treatments and more:

Melaena (29,850 reports)

How severe was Melaena and when was it recovered:

Melaena in Adalat

Expand to all the drugs that have ingredients of nifedipine:

Melaena and drugs with ingredients of nifedipine (452 reports)

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Adalat:

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 Melaena:

Melaena (1,322 drugs)

Browse all the conditions that are associated with Melaena:

Melaena (1,475 conditions)

How the study uses the data?

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