Zyrtec and Fioricet drug interactions - a phase IV clinical study of FDA data
Summary:
Drug interactions are reported among people who take Zyrtec (cetirizine hydrochloride) and Fioricet (acetaminophen; butalbital; caffeine). Common drug interactions include foot fracture among females and asthma among males.
The phase IV clinical study analyzes what interactions people have when they take Zyrtec and Fioricet. It is created by eHealthMe based on reports of 651 people who take the same drugs from the FDA, and is updated regularly.
What is Zyrtec?
Zyrtec has active ingredients of cetirizine hydrochloride. It is often used in allergies. eHealthMe is studying from 114,620 Zyrtec users. Check the latest studies of Zyrtec.
What is Fioricet?
Fioricet has active ingredients of acetaminophen; butalbital; caffeine. It is often used in migraine. eHealthMe is studying from 12,423 Fioricet users. Check the latest studies of Fioricet.
651 people who take Zyrtec and Fioricet together, and have interactions are studied.

What are the common drug interactions of Zyrtec and Fioricet, by gender? *
What are the common drug interactions of Zyrtec and Fioricet, by age (0-1 to 60+)? *
What are the existing conditions these people have? *
* Approximation only. Some reports may have incomplete information.
Do you take Zyrtec and Fioricet?
- Personalize this study to your gender, age, symptoms and drugs
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Related studies:
Effectiveness of, side effects of, and alternative drugs to the 2 drugs:
Browse all drug interactions of Zyrtec and Fioricet:
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 zSub-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 Zyrtec:
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 zBrowse all side effects of Fioricet:
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 zBrowse all interactions between Zyrtec and drugs from A to Z:
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 zBrowse all interactions between Fioricet and drugs from A to Z:
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 zHow the study uses the data?
The study uses data from the FDA. It is based on cetirizine hydrochloride and acetaminophen; butalbital; caffeine (the active ingredients of Zyrtec and Fioricet, respectively), and Zyrtec and Fioricet (the brand names). 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.
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