Effexor and Menstruation irregular - a phase IV clinical study of FDA data

Summary:

Menstruation irregular is reported as a side effect among people who take Effexor (venlafaxine hydrochloride), especially for people who are 30-39 old, have been taking the drug for < 1 month also take Plan B One-Step, and have Birth control.

The phase IV clinical study analyzes which people have Menstruation irregular when taking Effexor. It is created by eHealthMe based on reports of 92,291 people who have side effects when taking Effexor from the FDA, and is updated regularly.

What is Effexor?

Effexor has active ingredients of venlafaxine hydrochloride. It is often used in depression. eHealthMe is studying from 99,493 Effexor users. Check the latest studies of Effexor.

What is Menstruation irregular?

Menstruation irregular is found to be associated with 623 drugs and 911 conditions by eHealthMe. Check the latest studies of Menstruation irregular.

On Jul, 27, 2026

92,291 people reported to have side effects when taking Effexor.
Among them, 84 people (0.09%) have Menstruation irregular.

Could Effexor cause Menstruation irregular?

Among these 84 people:

How long have people been on Effexor when they have Menstruation irregular? *

What is the age of people who have Menstruation irregular when taking Effexor? *

What are other drugs people take besides Effexor? *

What are other side effects people have besides Menstruation irregular? *

Heavy Or Prolong Menstrual Bleeding: 17 people, 20.24%
Weight Increased: 13 people, 15.48%
Fatigue (feeling of tiredness): 12 people, 14.29%
Nausea (feeling of having an urge to vomit): 12 people, 14.29%
Dizziness: 11 people, 13.10%
Headache (pain in head): 11 people, 13.10%
Suicidal Ideation: 10 people, 11.90%
Muscle Spasms (muscle contraction): 9 people, 10.71%
Pain: 9 people, 10.71%
Visual Impairment: 9 people, 10.71%

What are the existing conditions these people have? *

Birth Control: 13 people, 15.48%
Suicidal Ideation: 6 people, 7.14%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 5 people, 5.95%
Pain: 5 people, 5.95%
Bipolar Disorder (mood disorder): 4 people, 4.76%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 4 people, 4.76%
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): 3 people, 3.57%
Insomnia (sleeplessness): 3 people, 3.57%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 2 people, 2.38%
Post-Traumatic Stress Disorder: 2 people, 2.38%

* Approximation only. Some reports may have incomplete information.

Do you take Effexor and have Menstruation irregular?

- Check whether Menstruation irregular 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:

Effexor (99,493 reports)

Browse all side effects of Effexor:

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 Menstruation irregular:

Menstruation irregular (623 drugs)

Browse all the conditions that are associated with Menstruation irregular:

Menstruation irregular (911 conditions)

Related publications that referenced our studies

Coskun, M., & Adak, I. , "Excessive and frequent menstrual bleeding with methylphenidate in an adolescent girl with attention-deficit hyperactivity disorder", Journal of clinical psychopharmacology, 2014 Jan .
Coskun, M., & Adak, I. , "Excessive and frequent menstrual bleeding with methylphenidate in an adolescent girl with attention-deficit hyperactivity disorder", Journal of clinical psychopharmacology, 2014 Jan .

How the study uses the data?

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