Omnicef vs. Claritin: side effect and effectiveness comparison (a real world drug study)
Summary:
We compare the side effects and drug effectiveness of Omnicef and Claritin. The phase IV clinical study is created by eHealthMe based on reports (from sources including the FDA) of 146,858 people who take Omnicef and Claritin, and is updated regularly.
What is Omnicef?
Omnicef has active ingredients of cefdinir. It is often used in sinusitis. eHealthMe is studying from 2,774 Omnicef users. Check the latest studies of Omnicef.
What is Claritin?
Claritin has active ingredients of loratadine. It is often used in allergies. eHealthMe is studying from 77,317 Claritin users. Check the latest studies of Claritin.
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 >>>.
146,858 people who take Omnicef and Claritin are studied.

Drugs being compared in this study:
- Omnicef (cefdinir)
- Claritin (loratadine)
Most common side effects of the drugs, overall:
Most common side effects of the drugs, in long term (1+ years) use:
Drug effectiveness:
Omnicef:
- not at all: 9.16 %
- somewhat: 29.48 %
- moderate: 32.67 %
- high: 20.72 %
- very high: 7.97 %
Claritin:
- not at all: 1.8900000000000001 %
- somewhat: 22.79 %
- moderate: 37.8 %
- high: 28.42 %
- very high: 9.1 %
Want to compare Omnicef with Claritin?
- Personalize this study to your gender and age (0-99+)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.
Related studies
Alternative drugs to, pros and cons of:
Browse all side effects of Omnicef:
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 Claritin:
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 is based on cefdinir and loratadine (the active ingredients of Omnicef and Claritin, respectively). Other drugs that have the same active ingredients (e.g. generic drugs or brand names) are also considered. Dosage of drugs is not considered in the study.
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.
Recent studies on eHealthMe:
- Drug interactions of Estradiol and Evening Primrose Oil - 11 seconds ago
- Could Magnevist cause Hypoaesthesia Oral? - 17 seconds ago
- Drug interactions of Flovent and Ceftriaxone Sodium - 17 seconds ago
- Could Lisinopril cause Red Blood Cell Count Increased? - 22 seconds ago
- Could Diclofenac Sodium cause Mean Platelet Volume Decreased? - 30 seconds ago
- Could Diclofenac Sodium cause Lipase Increased? - 32 seconds ago
- Drug interactions of Implanon and Prochlorperazine - 38 seconds ago
- Could Didanosine cause Drug Intolerance? - 42 seconds ago
- Could Ibandronate Sodium cause Dry Eyes? - 42 seconds ago
- Could Rituxan cause Generalized Anxiety Disorder? - 50 seconds ago