Claritin-d 24 hour and Drug effect decreased - a phase IV clinical study of FDA data

Summary:

Drug effect decreased is reported as a side effect among people who take Claritin-d 24 hour (loratadine; pseudoephedrine sulfate), especially for people who are female, 30-39 old, have been taking the drug for 10+ years also take Acyclovir, and have Hypersensitivity.

The phase IV clinical study analyzes which people have Drug effect decreased when taking Claritin-d 24 hour. It is created by eHealthMe based on reports of 3,690 people who have side effects when taking Claritin-d 24 hour from the FDA, and is updated regularly.

What is Claritin-d 24 hour?

Claritin-d 24 hour has active ingredients of loratadine; pseudoephedrine sulfate. It is often used in allergies. eHealthMe is studying from 4,086 Claritin-d 24 hour users. Check the latest studies of Claritin-d 24 hour.

What is Drug effect decreased?

Drug effect decreased is found to be associated with 1,463 drugs and 1,917 conditions by eHealthMe. Check the latest studies of Drug effect decreased.

On Jul, 05, 2026

3,690 people reported to have side effects when taking Claritin-d 24 hour.
Among them, 309 people (8.37%) have Drug effect decreased.

Could Claritin-d 24 hour cause Drug effect decreased?

Among these 309 people:

How long have people been on Claritin-d 24 hour when they have Drug effect decreased? *

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What is the gender of people who have Drug effect decreased when taking Claritin-d 24 hour? *

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What is the age of people who have Drug effect decreased when taking Claritin-d 24 hour? *

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* Approximation only. Some reports may have incomplete information.

Do you take Claritin-d 24 hour and have Drug effect decreased?

- Check whether Drug effect decreased is associated with a drug or a condition
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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Claritin-d 24 hour:

Claritin-d 24 hour (4,086 reports)

Drug effect decreased treatments and more:

Drug effect decreased (72,716 reports)

How severe was Drug effect decreased and when was it recovered:

Drug effect decreased in Claritin-d 24 hour

Expand to all the drugs that have ingredients of loratadine; pseudoephedrine sulfate:

Drug effect decreased and drugs with ingredients of loratadine; pseudoephedrine sulfate (424 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 Claritin-d 24 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 effect decreased:

Drug effect decreased (1,463 drugs)

Browse all the conditions that are associated with Drug effect decreased:

Drug effect decreased (1,917 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on loratadine; pseudoephedrine sulfate (the active ingredients of Claritin-d 24 hour) and Claritin-d 24 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.