Sudafed and Allegra d 24 hour drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Sudafed (pseudoephedrine hydrochloride) and Allegra d 24 hour (fexofenadine hydrochloride; pseudoephedrine hydrochloride). Common drug interactions include cholecystitis chronic among females.

The phase IV clinical study analyzes what interactions people have when they take Sudafed and Allegra d 24 hour. It is created by eHealthMe based on reports of 11 people who take the same drugs from the FDA, and is updated regularly.

What is Sudafed?

Sudafed has active ingredients of pseudoephedrine hydrochloride. It is often used in nasal congestion. eHealthMe is studying from 12,944 Sudafed users. Check the latest studies of Sudafed.

What is Allegra d 24 hour?

Allegra d 24 hour has active ingredients of fexofenadine hydrochloride; pseudoephedrine hydrochloride. It is often used in allergies. eHealthMe is studying from 1,427 Allegra d 24 hour users. Check the latest studies of Allegra d 24 hour.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Sep, 01, 2026

11 people who take Sudafed and Allegra d 24 hour together, and have interactions are studied.

Sudafed and Allegra d 24 hour drug interactions.

What are the common drug interactions of Sudafed and Allegra D 24 Hour, by gender? *:

female:

Cholecystitis chronic (long lasting infection of gallbladder)
Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
Back pain
Blood urea increased
Bone disorder
Bursitis (inflammation of a bursa, typically one in the knee, elbow, or shoulder)
Cervicitis (inflammation of the uterine cervix)
Chest pain
Colonic polyp (extra part of colon tissue grow in intestine)
Decreased appetite

male:

n/a

What are the common drug interactions of Sudafed and Allegra D 24 Hour, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

n/a

40-49:

Cholecystitis chronic (long lasting infection of gallbladder)
Gallbladder disorder
Myocardial infarction (destruction of heart tissue resulting from obstruction of the blood supply to the heart muscle)
Cholecystitis acute (rapid infection of gallbladder)
Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)

50-59:

Abdominal pain
Anaemia (lack of blood)
Cervicitis (inflammation of the uterine cervix)
Chest pain
Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
Colonic polyp (extra part of colon tissue grow in intestine)
Decreased appetite
Depression
Diarrhoea
Disease progression

60+:

n/a

What are the existing conditions these people have? *

Sarcoidosis (an inflammatory disease that affects multiple organs in the body, but mostly the lungs and lymph glands): 4 people, 36.36%
Osteomyelitis (infection of bone): 4 people, 36.36%
Menopause (end of monthly cycles in women): 4 people, 36.36%
Anaemia (lack of blood): 4 people, 36.36%
Ventricular Tachycardia (rapid heartbeat that originates in one of the lower chambers (the ventricles) of the heart): 3 people, 27.27%
Bipolar Disorder (mood disorder): 2 people, 18.18%

* Approximation only. Some reports may have incomplete information.

Do you take Sudafed and Allegra d 24 hour?

- 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