Allegra and Duodenitis - a phase IV clinical study of FDA data

Summary:

Duodenitis is reported as a side effect among people who take Allegra (fexofenadine hydrochloride), especially for people who are female, 40-49 old, also take Vicodin, and have Hypersensitivity.

The phase IV clinical study analyzes which people have Duodenitis when taking Allegra. It is created by eHealthMe based on reports of 73,095 people who have side effects when taking Allegra from the FDA, and is updated regularly.

What is Allegra?

Allegra has active ingredients of fexofenadine hydrochloride. It is often used in allergies. eHealthMe is studying from 75,497 Allegra users. Check the latest studies of Allegra.

What is Duodenitis?

Duodenitis (inflammation of the duodenum) is found to be associated with 649 drugs and 639 conditions by eHealthMe. Check the latest studies of Duodenitis.

On Jul, 10, 2026

73,095 people reported to have side effects when taking Allegra.
Among them, 45 people (0.06%) have Duodenitis.

Among these 45 people:

What is the gender of people who have Duodenitis when taking Allegra? *

female: 51.16 %
male: 48.84 %

What is the age of people who have Duodenitis when taking Allegra? *

What are other drugs people take besides Allegra? *

What are other side effects people have besides Duodenitis? *

Fever: 17 people, 37.78%
Gastritis (inflammation of stomach): 12 people, 26.67%
Impaired Gastric Emptying: 12 people, 26.67%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 11 people, 24.44%
Hiatal Hernia (hernia resulting from the protrusion of part of the stomach through the diaphragm): 11 people, 24.44%
Nausea (feeling of having an urge to vomit): 10 people, 22.22%
Oesophagitis (inflammation of oesophagus): 10 people, 22.22%
Bronchitis (inflammation of the mucous membrane in the bronchial tubes): 10 people, 22.22%
Gastric Ulcer (stomach ulcer): 10 people, 22.22%
Dehydration (dryness resulting from the removal of water): 10 people, 22.22%

What are the existing conditions these people have? *

Osteoporosis (bones weak and more likely to break): 4 people, 8.89%
Hypersensitivity: 4 people, 8.89%
Peripheral Arterial Occlusive Disease (reproducible ischemic muscle pain): 3 people, 6.67%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 3 people, 6.67%
Joint Pain: 3 people, 6.67%
Gastrointestinal Disorder (functional problems of gastrointestinal tract): 3 people, 6.67%
Irritable Bowel Syndrome: 2 people, 4.44%
Migraine (headache): 2 people, 4.44%
Anaemia (lack of blood): 2 people, 4.44%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 2 people, 4.44%

* Approximation only. Some reports may have incomplete information.

Do you take Allegra and have Duodenitis?

- Check whether Duodenitis 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 Allegra:

Allegra (75,497 reports)

Duodenitis treatments and more:

Duodenitis (5,271 reports)

Browse all side effects of Allegra:

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 Duodenitis:

Duodenitis (649 drugs)

Browse all the conditions that are associated with Duodenitis:

Duodenitis (639 conditions)

How the study uses the data?

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