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Comtan vs. Ropinirole hydrochloride: side effect and effectiveness comparison (a real world drug study)

Summary:

We compare the side effects and drug effectiveness of Comtan and Ropinirole hydrochloride. The phase IV clinical study is created by eHealthMe based on reports (from sources including the FDA) of 51,167 people who take Comtan and Ropinirole hydrochloride, and is updated regularly.

What is Comtan?

Comtan has active ingredients of entacapone. It is often used in parkinson's disease. eHealthMe is studying from 3,979 Comtan users. Check the latest studies of Comtan.

What is Ropinirole hydrochloride?

Ropinirole hydrochloride has active ingredients of ropinirole hydrochloride. It is often used in restless leg syndrome. eHealthMe is studying from 4,167 Ropinirole hydrochloride users. Check the latest studies of Ropinirole hydrochloride.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Sep, 01, 2026

51,167 people who take Comtan and Ropinirole hydrochloride are studied.

Comtan vs Ropinirole hydrochloride drug comparison reports.

Drugs being compared in this study:

  • Ropinirole Hydrochloride (ropinirole hydrochloride)
  • Comtan (entacapone)

Most common side effects of the drugs, overall:

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Most common side effects of the drugs, in long term (1+ years) use:

Click here to view

Drug effectiveness:

Comtan:

  • not at all: 2.56 %
  • somewhat: 17.95 %
  • moderate: 43.59 %
  • high: 30.77 %
  • very high: 5.13 %

Ropinirole Hydrochloride:

  • not at all: 2.5300000000000002 %
  • somewhat: 14.77 %
  • moderate: 28.28 %
  • high: 42.18 %
  • very high: 12.24 %

Want to compare Comtan with Ropinirole hydrochloride?

- Personalize this study to your gender and age (0-99+)

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

Alternative drugs to, pros and cons of:

Browse all side effects of Comtan:

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 side effects of Ropinirole hydrochloride:

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

How the study uses the data?

The study is based on entacapone and ropinirole hydrochloride (the active ingredients of Comtan and Ropinirole hydrochloride, respectively). Other drugs that have the same active ingredients (e.g. generic drugs or brand names) are also 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.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.

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