Effexor xr and Extrasystoles - a phase IV clinical study of FDA data

Summary:

Extrasystoles is reported as a side effect among people who take Effexor xr (venlafaxine hydrochloride), especially for people who are female, 50-59 old, have been taking the drug for < 1 month also take Maxalt, and have Osteoarthritis.

The phase IV clinical study analyzes which people have Extrasystoles when taking Effexor xr. It is created by eHealthMe based on reports of 31,325 people who have side effects when taking Effexor xr from the FDA, and is updated regularly.

What is Effexor xr?

Effexor xr has active ingredients of venlafaxine hydrochloride. It is often used in depression. eHealthMe is studying from 35,235 Effexor xr users. Check the latest studies of Effexor xr.

What is Extrasystoles?

Extrasystoles is found to be associated with 733 drugs and 954 conditions by eHealthMe. Check the latest studies of Extrasystoles.

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 Aug, 31, 2026

31,325 people reported to have side effects when taking Effexor xr.
Among them, 25 people (0.08%) have Extrasystoles.

Among these 25 people:

How long have people been on Effexor xr when they have Extrasystoles? *

What is the gender of people who have Extrasystoles when taking Effexor xr? *

female: 68 %
male: 32 %

What is the age of people who have Extrasystoles when taking Effexor xr? *

What are other drugs people take besides Effexor xr? *

What are other side effects people have besides Extrasystoles? *

Nausea (feeling of having an urge to vomit): 10 people, 40.00%
Diarrhea: 6 people, 24.00%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 6 people, 24.00%
High Blood Pressure: 6 people, 24.00%
Fatigue (feeling of tiredness): 5 people, 20.00%
Ventricular Extrasystoles (premature cardiac contraction): 5 people, 20.00%
Anaemia (lack of blood): 5 people, 20.00%
Irritability: 4 people, 16.00%
Abdominal Pain: 4 people, 16.00%
Abdominal Pain Upper: 4 people, 16.00%

What are the existing conditions these people have? *

Osteoarthritis (a joint disease caused by cartilage loss in a joint): 4 people, 16.00%
Major Depression (a mood state that goes well beyond temporarily feeling sad or blue. it is a serious medical illness that affects one's thoughts, feelings): 2 people, 8.00%
Bipolar I Disorder (mood disorder that is characterized by at least one manic or mixed episode): 2 people, 8.00%
Myelodysplastic Syndrome (a group of conditions that occur when the blood-forming cells in the bone marrow are damaged): 1 person, 4.00%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 1 person, 4.00%
Mental Disorder (a psychological term for a mental or behavioural pattern or anomaly that causes distress or disability): 1 person, 4.00%
Iron Overload: 1 person, 4.00%
Insomnia (sleeplessness): 1 person, 4.00%
Indigestion: 1 person, 4.00%
High Blood Pressure: 1 person, 4.00%

* Approximation only. Some reports may have incomplete information.

Do you take Effexor xr and have Extrasystoles?

- Check whether Extrasystoles 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 Effexor xr:

Effexor xr (35,235 reports)

Extrasystoles treatments and more:

Extrasystoles (8,909 reports)

Browse all side effects of Effexor xr:

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 Extrasystoles:

Extrasystoles (733 drugs)

Browse all the conditions that are associated with Extrasystoles:

Extrasystoles (954 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on venlafaxine hydrochloride (the active ingredients of Effexor xr) and Effexor xr (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.