Allegra and Keppra drug interactions - a phase IV clinical study of FDA data
Summary:
Drug interactions are reported among people who take Allegra (fexofenadine hydrochloride) and Keppra (levetiracetam). Common drug interactions include somnolence among females and diarrhoea among males.
The phase IV clinical study analyzes what interactions people have when they take Allegra and Keppra. It is created by eHealthMe based on reports of 389 people who take the same drugs 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 75,498 Allegra users. Check the latest studies of Allegra.
What is Keppra?
Keppra has active ingredients of levetiracetam. It is often used in epilepsy. eHealthMe is studying from 73,504 Keppra users. Check the latest studies of Keppra.
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 >>>.
389 people who take Allegra and Keppra together, and have interactions are studied.

What are the common drug interactions of Allegra and Keppra, by gender? *
What are the common drug interactions of Allegra and Keppra, 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 Allegra and Keppra?
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Related studies:
Effectiveness of, side effects of, and alternative drugs to the 2 drugs:
Browse all drug interactions of Allegra and Keppra:
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 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 zBrowse all side effects of Keppra:
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 Allegra 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 Keppra 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 zRelated publications that referenced our studies
- Schattner A, Al-Bewerat A, "Levetiracetam (Keppra), urinary retention and literature search", A fatty cause of renal failure; what is your diagnosis?, 2016 Oct .
- Spengler DC, Montouris GD, Hohler AD, "Levetiracetam as a possible contributor to acute kidney injury", Clinical therapeutics, 2014 Aug .
- Almeida DM, Jean MR, Chystsiakova A, Monahan E, Oliveira SB, Monteiro IM, "Levetiracetam-associated acute pancreatitis in an adolescent with autism: a case report", Pancreas, 2013 Jan .
- Schattner A, Al-Bewerat A, "Levetiracetam (Keppra), urinary retention and literature search", A fatty cause of renal failure; what is your diagnosis?, 2016 Oct .
- Spengler DC, Montouris GD, Hohler AD, "Levetiracetam as a possible contributor to acute kidney injury", Clinical therapeutics, 2014 Aug .
- Almeida DM, Jean MR, Chystsiakova A, Monahan E, Oliveira SB, Monteiro IM, "Levetiracetam-associated acute pancreatitis in an adolescent with autism: a case report", Pancreas, 2013 Jan .
How the study uses the data?
The study uses data from the FDA. It is based on fexofenadine hydrochloride and levetiracetam (the active ingredients of Allegra and Keppra, respectively), and Allegra and Keppra (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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