Fentora and Malaise - a phase IV clinical study of FDA data

Summary:

Malaise is reported as a side effect among people who take Fentora (fentanyl citrate), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Fentanyl, and have Pain.

The phase IV clinical study analyzes which people have Malaise when taking Fentora. It is created by eHealthMe based on reports of 26,472 people who have side effects when taking Fentora from the FDA, and is updated regularly.

What is Fentora?

Fentora has active ingredients of fentanyl citrate. eHealthMe is studying from 26,490 Fentora users. Check the latest studies of Fentora.

What is Malaise?

Malaise (a feeling of general discomfort or uneasiness) is found to be associated with 3,500 drugs and 5,120 conditions by eHealthMe. Check the latest studies of Malaise.

On Jul, 27, 2026

26,472 people reported to have side effects when taking Fentora.
Among them, 80 people (0.3%) have Malaise.

Among these 80 people:

How long have people been on Fentora when they have Malaise? *

What is the gender of people who have Malaise when taking Fentora? *

female: 75.64 %
male: 24.36 %

What is the age of people who have Malaise when taking Fentora? *

What are other drugs people take besides Fentora? *

Fentanyl: 7 people, 8.75%
Humalog: 6 people, 7.50%
Gemcitabine: 5 people, 6.25%
Rabeprazole Sodium: 5 people, 6.25%
Duragesic-100: 5 people, 6.25%
Erlotinib Hydrochloride: 5 people, 6.25%
Oxycontin: 5 people, 6.25%
Dilaudid: 4 people, 5.00%
Actiq: 4 people, 5.00%
Oxycodone: 4 people, 5.00%

What are other side effects people have besides Malaise? *

Pain: 23 people, 28.75%
Nausea (feeling of having an urge to vomit): 14 people, 17.50%
Nausea And Vomiting: 7 people, 8.75%
Constipation: 6 people, 7.50%
Neoplasm Malignant (cancer tumour): 6 people, 7.50%
Stomatitis (inflammation of mucous membrane of mouth): 6 people, 7.50%
Intestinal Obstruction: 5 people, 6.25%
Metastases To Peritoneum (cancer spreads to peritoneum): 5 people, 6.25%
Petit Mal Epilepsy (absence seizure): 5 people, 6.25%
Gastrointestinal Haemorrhage (bleeding gastrointestinal tract): 5 people, 6.25%

What are the existing conditions these people have? *

Pain: 19 people, 23.75%
Breakthrough Pain: 7 people, 8.75%
Pancreatic Carcinoma (pancreatic cancer): 5 people, 6.25%
Cancer Pain: 5 people, 6.25%
Stress And Anxiety: 3 people, 3.75%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 3 people, 3.75%
Infection: 3 people, 3.75%
Depression: 2 people, 2.50%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 2 people, 2.50%
Brucellosis (a bacterial disease typically affecting cattle and humans caused esp. by the bacteria brucella abortus): 2 people, 2.50%

* Approximation only. Some reports may have incomplete information.

Do you take Fentora and have Malaise?

- Check whether Malaise 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 Fentora:

Fentora (26,490 reports)

Malaise treatments and more:

Malaise (529,933 reports)

Browse all side effects of Fentora:

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 Malaise:

Malaise (3,500 drugs)

Browse all the conditions that are associated with Malaise:

Malaise (5,120 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on fentanyl citrate (the active ingredients of Fentora) and Fentora (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.