Intron a and Drowsiness - a phase IV clinical study of FDA data

Summary:

Drowsiness is reported as a side effect among people who take Intron a (interferon alfa-2b), especially for people who are male, 60+ old, have been taking the drug for < 1 month also take Keflex, and have Renal cancer metastatic.

The phase IV clinical study analyzes which people have Drowsiness when taking Intron a. It is created by eHealthMe based on reports of 9,303 people who have side effects when taking Intron a from the FDA, and is updated regularly.

What is Intron a?

Intron a has active ingredients of interferon alfa-2b. eHealthMe is studying from 9,320 Intron a users. Check the latest studies of Intron a.

What is Drowsiness?

Drowsiness is found to be associated with 2,866 drugs and 4,797 conditions by eHealthMe. Check the latest studies of Drowsiness.

On Jul, 10, 2026

9,303 people reported to have side effects when taking Intron a.
Among them, 53 people (0.57%) have Drowsiness.

Among these 53 people:

How long have people been on Intron a when they have Drowsiness? *

What is the gender of people who have Drowsiness when taking Intron a? *

female: 38 %
male: 62 %

What is the age of people who have Drowsiness when taking Intron a? *

What are other drugs people take besides Intron a? *

What are other side effects people have besides Drowsiness? *

Fatigue (feeling of tiredness): 29 people, 54.72%
Weight Decreased: 22 people, 41.51%
Diarrhea: 22 people, 41.51%
Appetite - Decreased (decreased appetite occurs when you have a reduced desire to eat): 21 people, 39.62%
Weakness: 19 people, 35.85%
Stress And Anxiety: 18 people, 33.96%
Pain: 17 people, 32.08%
Confusional State: 16 people, 30.19%
Abdominal Pain: 16 people, 30.19%
Nausea (feeling of having an urge to vomit): 14 people, 26.42%

What are the existing conditions these people have? *

Renal Cancer Metastatic (cancer of kidney spreads to other part): 9 people, 16.98%
Urticaria Pigmentosa (skin disease that produces patches of darker skin (lesions) and very bad itching): 4 people, 7.55%
Renal Cell Carcinoma (a kidney cancer): 4 people, 7.55%
Hepatitis C: 4 people, 7.55%
Malignant Melanoma (skin cancer rises from melancytes): 4 people, 7.55%
Malignant Melanoma Site/stage Unspecified (cancer of skin un specific stage): 3 people, 5.66%
Malignant Respiratory Tract Neoplasm (cancer tumour of respiratory tract): 2 people, 3.77%
Malignant Urinary Tract Neoplasm (cancer tumour of urinary tract organs): 2 people, 3.77%
Metastatic Renal Cell Carcinoma (spreadable kidney cell tumour): 1 person, 1.89%
Renal Cell Carcinoma Stage Unspecified (kidney cancer in unknown stage): 1 person, 1.89%

* Approximation only. Some reports may have incomplete information.

Do you take Intron a and have Drowsiness?

- Check whether Drowsiness is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, long term effects of, and alternative drugs to Intron a:

Intron a (9,320 reports)

Drowsiness treatments and more:

Drowsiness (269,040 reports)

Browse all side effects of Intron a:

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 Drowsiness:

Drowsiness (2,866 drugs)

Browse all the conditions that are associated with Drowsiness:

Drowsiness (4,797 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on interferon alfa-2b (the active ingredients of Intron a) and Intron a (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.