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

Summary:

Drowsiness is reported as a side effect among people who take Abstral (fentanyl citrate), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Lyrica, and have Cancer pain.

The phase IV clinical study analyzes which people have Drowsiness when taking Abstral. It is created by eHealthMe based on reports of 1,388 people who have side effects when taking Abstral from the FDA, and is updated regularly.

What is Abstral?

Abstral has active ingredients of fentanyl citrate. eHealthMe is studying from 1,390 Abstral users. Check the latest studies of Abstral.

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, 22, 2026

1,388 people reported to have side effects when taking Abstral.
Among them, 42 people (3.03%) have Drowsiness.

Among these 42 people:

How long have people been on Abstral when they have Drowsiness? *

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

female: 70.73 %
male: 29.27 %

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

What are other drugs people take besides Abstral? *

Lyrica: 12 people, 28.57%
Midazolam: 5 people, 11.90%
Morphine: 5 people, 11.90%
Oxycontin: 5 people, 11.90%
Paracetamol: 4 people, 9.52%
Naloxegol: 4 people, 9.52%
Zyprexa: 3 people, 7.14%
Cymbalta: 3 people, 7.14%
Acetaminophen: 3 people, 7.14%
Tapentadol Hydrochloride: 3 people, 7.14%

What are other side effects people have besides Drowsiness? *

Insomnia (sleeplessness): 7 people, 16.67%
Delirium (wild excitement): 6 people, 14.29%
Drug Ineffective: 6 people, 14.29%
Anuria (failure of the kidneys to produce urine): 5 people, 11.90%
Rectal Cancer (cancer of rectum): 5 people, 11.90%
Nausea (feeling of having an urge to vomit): 5 people, 11.90%
Death: 4 people, 9.52%
Discomfort: 4 people, 9.52%
Dry Mouth: 4 people, 9.52%
Increased Bronchial Secretion: 4 people, 9.52%

What are the existing conditions these people have? *

Cancer Pain: 19 people, 45.24%
Breakthrough Pain: 13 people, 30.95%
Pain: 4 people, 9.52%
Back Pain: 2 people, 4.76%
Insomnia (sleeplessness): 2 people, 4.76%
Sinus Disorder (disease of sinus): 1 person, 2.38%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 1 person, 2.38%
Ascites (accumulation of fluid in the abdominal cavity): 1 person, 2.38%
Constipation: 1 person, 2.38%
Depression: 1 person, 2.38%

* Approximation only. Some reports may have incomplete information.

Do you take Abstral 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 Abstral:

Abstral (1,390 reports)

Drowsiness treatments and more:

Drowsiness (269,040 reports)

Browse all side effects of Abstral:

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 fentanyl citrate (the active ingredients of Abstral) and Abstral (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.