Drowsiness in Subsys - how severe and when it was recovered? (a real world drug study)

Summary:

We study how severe was Drowsiness, when it was recovered, drug effectiveness, race, and more among people who take Subsys (fentanyl). This phase IV clinical study is created by eHealthMe based on reports submitted to eHealthMe, and is updated regularly.

What is Subsys?

Subsys has active ingredients of fentanyl. eHealthMe is studying from 9,239 Subsys users. Check the latest studies of Subsys.

What is Drowsiness?

Drowsiness is found to be associated with 2,864 drugs and 4,792 conditions by eHealthMe. Check the latest studies of Drowsiness.

On Apr, 06, 2026

19 people who have Drowsiness while taking Subsys were studied.

Severity of Drowsiness *:

least: 0.0 %
moderate: 20 %
severe: 60 %
most severe: 20 %

When people recovered from Drowsiness *:

while on drug: 0.0 %
after off the drug: 0.0 %
not yet: 100 %

Effectiveness of Subsys *:

not at all: 0.0 %
somewhat: 12.5 %
moderate: 43.75 %
high: 31.25 %
very high: 12.5 %

Race of the people *:

African American, Non-Hispanic: 0.0 %
American Indian/Alaska Native: 0.0 %
Asian: 0.0 %
Hispanic: 7.14 %
Native Hawaiians/Pacific Islanders: 0.0 %
Two or more races: 0.0 %
White, Non-Hispanic: 92.86 %

Time on Subsys *:

Gender of people when taking Subsys *:

female: 63.16 %
male: 36.84 %

Age of people when taking Subsys *:

Conditions people have *:

Pain: 10 people, 52.63%
Depression: 9 people, 47.37%
Back Pain: 4 people, 21.05%
Muscle Spasms (muscle contraction): 4 people, 21.05%
High Blood Pressure: 3 people, 15.79%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 3 people, 15.79%
Constipation: 2 people, 10.53%
High Blood Cholesterol: 2 people, 10.53%
Fibromyalgia (a long-term condition which causes pain all over the body): 2 people, 10.53%
Insomnia (sleeplessness): 2 people, 10.53%

Other drugs people take besides Subsys *:

Cymbalta: 4 people, 21.05%
Baclofen: 3 people, 15.79%
Lyrica: 2 people, 10.53%
Lexapro: 2 people, 10.53%
Crestor: 2 people, 10.53%
Flexeril: 2 people, 10.53%
Bupropion Hydrochloride: 2 people, 10.53%
Plaquenil: 2 people, 10.53%
Omeprazole: 2 people, 10.53%
Zanaflex: 2 people, 10.53%

Other side effects people have besides Drowsiness *:

Depression: 2 people, 10.53%
Fatigue (feeling of tiredness): 2 people, 10.53%
Weight Increased: 1 person, 5.26%
Hearing Loss: 1 person, 5.26%
Apraxia (disorder that affects a person's ability to organize the movements of the muscles used in speech): 1 person, 5.26%
Chronic Fatigue Syndrome (disorder that causes extreme fatigue): 1 person, 5.26%
Confusion: 1 person, 5.26%
Delirium (wild excitement): 1 person, 5.26%
Erection Problems: 1 person, 5.26%
Facial Pain: 1 person, 5.26%

* Approximation only. Some reports may have incomplete information.

Do you take Subsys and have Drowsiness?

Check whether Drowsiness is associated with a drug or a condition

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.

Related studies

Drowsiness in Subsys

How the study uses the data?

The study is based on fentanyl (the active ingredients of Subsys). Other drugs that have the same active ingredients (e.g. generic drugs) are considered. Dosage of drugs is not considered in the study.

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.

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