Allegra-d 12 hour and Drug hypersensitivity - a phase IV clinical study of FDA data

Summary:

Drug hypersensitivity is reported as a side effect among people who take Allegra-d 12 hour (fexofenadine hydrochloride; pseudoephedrine hydrochloride), especially for people who are female, 60+ old, have been taking the drug for 5 - 10 years also take Synthroid, and have Hypersensitivity.

The phase IV clinical study analyzes which people have Drug hypersensitivity when taking Allegra-d 12 hour. It is created by eHealthMe based on reports of 577 people who have side effects when taking Allegra-d 12 hour from the FDA, and is updated regularly.

What is Allegra-d 12 hour?

Allegra-d 12 hour has active ingredients of fexofenadine hydrochloride; pseudoephedrine hydrochloride. It is often used in allergies. eHealthMe is studying from 852 Allegra-d 12 hour users. Check the latest studies of Allegra-d 12 hour.

What is Drug hypersensitivity?

Drug hypersensitivity is found to be associated with 2,484 drugs and 2,339 conditions by eHealthMe. Check the latest studies of Drug hypersensitivity.

On Jul, 14, 2026

577 people reported to have side effects when taking Allegra-d 12 hour.
Among them, 21 people (3.64%) have Drug hypersensitivity.

Could Allegra-d 12 hour cause Drug hypersensitivity?

Among these 21 people:

How long have people been on Allegra-d 12 hour when they have Drug hypersensitivity? *

What is the gender of people who have Drug hypersensitivity when taking Allegra-d 12 hour? *

female: 94.44 %
male: 5.56 %

What is the age of people who have Drug hypersensitivity when taking Allegra-d 12 hour? *

What are other drugs people take besides Allegra-d 12 hour? *

What are other side effects people have besides Drug hypersensitivity? *

Weight Decreased: 11 people, 52.38%
Femur Fracture: 8 people, 38.10%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 8 people, 38.10%
Low Turnover Osteopathy (slow removal of old bone and its replacement by new bone): 8 people, 38.10%
Scab (a hard coating on the skin formed during the wound healing): 7 people, 33.33%
Gangrene (body tissue dies): 7 people, 33.33%
Blister (small pocket of fluid within the upper layers of the skin caused by forceful rubbing (friction), burning, freezing, chemical exposure): 7 people, 33.33%
Localised Infection (infection at the single location): 7 people, 33.33%
Osteoarthritis (a joint disease caused by cartilage loss in a joint): 7 people, 33.33%
Swallowing Difficulty: 6 people, 28.57%

What are the existing conditions these people have? *

Hypersensitivity: 9 people, 42.86%
Osteoporosis (bones weak and more likely to break): 8 people, 38.10%
High Blood Pressure: 8 people, 38.10%
Pain: 7 people, 33.33%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 7 people, 33.33%
Fungal Infection: 7 people, 33.33%
Asthma: 4 people, 19.05%
Wheezing (a high-pitched whistling sound made while you breath): 3 people, 14.29%
Osteopenia (a condition where bone mineral density is lower than normal): 3 people, 14.29%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 1 person, 4.76%

* Approximation only. Some reports may have incomplete information.

Do you take Allegra-d 12 hour and have Drug hypersensitivity?

- Check whether Drug hypersensitivity 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-d 12 hour:

Allegra-d 12 hour (852 reports)

Drug hypersensitivity treatments and more:

Drug hypersensitivity (222,796 reports)

How severe was Drug hypersensitivity and when was it recovered:

Drug hypersensitivity in Allegra-d 12 hour

Expand to all the drugs that have ingredients of fexofenadine hydrochloride; pseudoephedrine hydrochloride:

Drug hypersensitivity and drugs with ingredients of fexofenadine hydrochloride; pseudoephedrine hydrochloride

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 Allegra-d 12 hour:

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 Drug hypersensitivity:

Drug hypersensitivity (2,484 drugs)

Browse all the conditions that are associated with Drug hypersensitivity:

Drug hypersensitivity (2,339 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on fexofenadine hydrochloride; pseudoephedrine hydrochloride (the active ingredients of Allegra-d 12 hour) and Allegra-d 12 hour (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.