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Fentanyl and Scratch - a phase IV clinical study of FDA data

Summary:

Scratch is reported as a side effect among people who take Fentanyl (fentanyl citrate), especially for people who are female, 60+ old, also take Xolair, and have Asthma.

The phase IV clinical study analyzes which people have Scratch when taking Fentanyl. It is created by eHealthMe based on reports of 72,646 people who have side effects when taking Fentanyl from the FDA, and is updated regularly.

What is Fentanyl?

Fentanyl has active ingredients of fentanyl citrate. It is often used in pain. eHealthMe is studying from 73,301 Fentanyl users. Check the latest studies of Fentanyl.

What is Scratch?

Scratch is found to be associated with 743 drugs and 732 conditions by eHealthMe. Check the latest studies of Scratch.

On Jan, 07, 2026

72,646 people reported to have side effects when taking Fentanyl.
Among them, 40 people (0.06%) have Scratch.

Could Fentanyl cause Scratch?

Among these 40 people:

What is the gender of people who have Scratch when taking Fentanyl? *

  • female: 75 %
  • male: 25 %

What is the age of people who have Scratch when taking Fentanyl? *

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 2.78 %
  • 30-39: 0.0 %
  • 40-49: 22.22 %
  • 50-59: 27.78 %
  • 60+: 47.22 %

What are other drugs people take besides Fentanyl? *

  1. Xolair: 13 people, 32.50%
  2. Pantoprazole: 12 people, 30.00%
  3. Lasix: 8 people, 20.00%
  4. Zantac: 8 people, 20.00%
  5. Advair Hfa: 8 people, 20.00%
  6. Spiriva: 8 people, 20.00%
  7. Singulair: 7 people, 17.50%
  8. Humira: 7 people, 17.50%
  9. Benadryl: 6 people, 15.00%
  10. Xanax: 6 people, 15.00%

What are other side effects people have besides Scratch? *

  1. Fall: 18 people, 45.00%
  2. Itching: 14 people, 35.00%
  3. Fatigue (feeling of tiredness): 14 people, 35.00%
  4. Feeling Abnormal: 14 people, 35.00%
  5. Weakness: 13 people, 32.50%
  6. Head Injury: 13 people, 32.50%
  7. Joint Pain: 13 people, 32.50%
  8. Urticaria (rash of round, red welts on the skin that itch intensely): 11 people, 27.50%
  9. High Blood Pressure: 10 people, 25.00%
  10. Nausea (feeling of having an urge to vomit): 10 people, 25.00%

What are the existing conditions these people have? *

  1. Asthma: 6 people, 15.00%
  2. Constipation: 5 people, 12.50%
  3. Depression: 5 people, 12.50%
  4. Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 5 people, 12.50%
  5. Panic Disorder: 4 people, 10.00%
  6. Nausea (feeling of having an urge to vomit): 3 people, 7.50%
  7. Stress And Anxiety: 3 people, 7.50%
  8. Stable Angina (a constant chest pain): 3 people, 7.50%
  9. Diabetes: 3 people, 7.50%
  10. Enlarged Prostate: 3 people, 7.50%

* Approximation only. Some reports may have incomplete information.

Do you take Fentanyl and have Scratch?

- Check whether Scratch is associated with a drug or a condition (FREE)
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- Get an AI agent to monitor your drugs continuously (FREE)

Related studies:

Effectiveness of, long term effects of, and alternative drugs to Fentanyl:

Scratch treatments and more:

How severe was Scratch and when was it recovered:

Expand to all the drugs that have ingredients of fentanyl citrate:

Sub-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 Fentanyl:

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

Browse all the drugs that are associated with Scratch:

Browse all the conditions that are associated with Scratch:

Drugs similar to Fentanyl and Scratch :

How the study uses the data?

The study uses data from the FDA. It is based on fentanyl citrate (the active ingredients of Fentanyl) and Fentanyl (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.

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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