Neulasta and Bell's palsy - a phase IV clinical study of FDA data


Bell's palsy is found among people who take Neulasta, especially for people who are female, 50-59 old, have been taking the drug for 1 - 6 months.

The phase IV clinical study analyzes which people take Neulasta and have Bell's palsy. It is created by eHealthMe based on reports of 79,165 people who have side effects when taking Neulasta 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 May, 26, 2023

79,165 people reported to have side effects when taking Neulasta.
Among them, 26 people (0.03%) have Bell's palsy.

What is Neulasta?

Neulasta has active ingredients of pegfilgrastim. It is often used in agranulocytosis. eHealthMe is studying from 79,300 Neulasta users for its effectiveness, alternative drugs and more.

What is Bell's palsy?

Bell's palsy (facial paralysis) is found to be associated with 1,607 drugs and 1,153 conditions by eHealthMe.

Number of Neulasta and Bell's palsy reports submitted per year:

Could Neulasta cause Bell's palsy?

Time on Neulasta when people have Bell's palsy *:

  • < 1 month: 0.0 %
  • 1 - 6 months: 100 %
  • 6 - 12 months: 0.0 %
  • 1 - 2 years: 0.0 %
  • 2 - 5 years: 0.0 %
  • 5 - 10 years: 0.0 %
  • 10+ years: 0.0 %

Gender of people who have Bell's palsy when taking Neulasta *:

  • female: 92.31 %
  • male: 7.69 %

Age of people who have Bell's palsy when taking Neulasta *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 29.17 %
  • 40-49: 4.17 %
  • 50-59: 54.17 %
  • 60+: 12.5 %

Common drugs people take besides Neulasta *:

  1. Ativan: 13 people, 50.00%
  2. Copegus: 9 people, 34.62%
  3. Effexor: 9 people, 34.62%
  4. Pegasys: 9 people, 34.62%
  5. Ribasphere: 9 people, 34.62%
  6. Ribavirin: 9 people, 34.62%
  7. Lecithin: 9 people, 34.62%
  8. Ondansetron: 8 people, 30.77%
  9. Paxil: 7 people, 26.92%
  10. Neupogen: 7 people, 26.92%

Common side effects people have besides Bell's palsy *:

  1. Diarrhea: 18 people, 69.23%
  2. Appetite - Decreased (decreased appetite occurs when you have a reduced desire to eat): 15 people, 57.69%
  3. Anaemia (lack of blood): 14 people, 53.85%
  4. Fatigue (feeling of tiredness): 13 people, 50.00%
  5. Joint Pain: 12 people, 46.15%
  6. Headache (pain in head): 12 people, 46.15%
  7. White Blood Cell Count Decreased: 9 people, 34.62%
  8. Pancytopenia (medical condition in which there is a reduction in the number of red and white blood cells, as well as platelets): 9 people, 34.62%
  9. Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 9 people, 34.62%
  10. Oropharyngeal Pain: 9 people, 34.62%

Common conditions people have *:

  1. Hepatitis C: 9 people, 34.62%
  2. Bone Density Decreased: 6 people, 23.08%
  3. Sleep Apnea Syndrome: 4 people, 15.38%
  4. Non-Hodgkin's Lymphoma (malignant (cancer) cells form in the lymph system): 2 people, 7.69%
  5. Haemoglobin Decreased: 2 people, 7.69%
  6. Resorption Bone Increased: 1 person, 3.85%
  7. Breast Cancer Metastatic: 1 person, 3.85%

* Approximation only. Some reports may have incomplete information.

Do you take Neulasta and have Bell's palsy?

Check whether Bell's palsy is associated with a drug or a condition

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 publications that referenced our studies

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How severe was Bell's palsy and when was it recovered:

Expand to all the drugs that have ingredients of pegfilgrastim:

Alternative drugs to, pros and cons of Neulasta:

Common Neulasta side effects:

Browse all side effects of Neulasta:

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

Bell's palsy treatments and more:

COVID vaccines that are related to Bell's palsy:

Common drugs associated with Bell's palsy:

All the drugs that are associated with Bell's palsy:

Common conditions associated with Bell's palsy:

All the conditions that are associated with Bell's palsy:

How the study uses the data?

The study uses data from the FDA. It is based on pegfilgrastim (the active ingredients of Neulasta) and Neulasta (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.

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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