Alrex and Xyzal drug interactions - a phase IV clinical study of FDA data


Drug interactions are reported among people who take Alrex and Xyzal. Common interactions include hypersensitivity among females and colitis among males.

The phase IV clinical study analyzes what interactions people who take Alrex and Xyzal have. It is created by eHealthMe based on reports of 7 people who take Alrex and Xyzal from the FDA, and is updated regularly. You can use the study as a second opinion to make health care decisions.

Phase IV trials are used to detect adverse drug outcomes and monitor drug effectiveness in the real world. With medical big data and AI algorithms, eHealthMe is running millions of phase IV trials and makes the results available to the public. Our original studies have been referenced on 600+ medical publications including The Lancet, Mayo Clinic Proceedings, and Nature.

On Aug, 16, 2022

7 people who take Alrex and Xyzal together, and have interactions are studied.

What is Alrex?

Alrex has active ingredients of loteprednol etabonate. eHealthMe is studying from 573 Alrex users for its effectiveness, alternative drugs and more.

What is Xyzal?

Xyzal has active ingredients of levocetirizine dihydrochloride. It is often used in allergies. eHealthMe is studying from 15,686 Xyzal users for its effectiveness, alternative drugs and more.

Number of Alrex and Xyzal reports submitted per year:

Alrex and Xyzal drug interactions.

Common Alrex and Xyzal drug interactions by gender *:


  1. Hypersensitivity
  2. Pruritus
  3. Urticaria
  4. Abdominal pain upper
  5. Adverse drug reaction
  6. Anaphylactic reaction
  7. Asthenia
  8. Cataract
  9. Diarrhoea
  10. Ear infection


  1. Colitis
  2. Diarrhoea
  3. Drug ineffective
  4. Fatigue
  5. Haematochezia
  6. Hallucination
  7. Headache
  8. Photosensitivity reaction

Common Alrex and Xyzal drug interactions by age *:










  1. Fatigue
  2. Abdominal pain upper
  3. Anaphylactic reaction
  4. Diarrhoea
  5. Drug ineffective
  6. Headache
  7. Hypocomplementaemia
  8. Injection site reaction
  9. Myalgia
  10. Pharyngeal oedema


  1. Haematochezia
  2. Colitis
  3. Diarrhoea




  1. Tremor
  2. Hypersensitivity
  3. Pruritus
  4. Urticaria
  5. Asthenia
  6. Hallucination
  7. Myalgia
  8. Nausea

* Approximation only. Some reports may have incomplete information.

Do you take Alrex and Xyzal?

Personalize this study to your gender and age

How to use the study?

You can discuss the study with your doctor, to ensure that all drug risks and benefits are fully discussed and understood.

Related studies

Alternative drugs to, pros and cons of the 2 drugs:

Browse all drug interactions of Alrex and Xyzal:

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

Common Xyzal interactions:

Browse all interactions between Xyzal 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 z

How the study uses the data?

The study uses data from the FDA. It is based on loteprednol etabonate and levocetirizine dihydrochloride (the active ingredients of Alrex and Xyzal, respectively), and Alrex and Xyzal (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. Patients in the study may take other drugs besides Alrex and Xyzal.

Who is eHealthMe?

With medical big data and proven AI 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 600+ 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: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on 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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