Pristiq and Fear - a phase IV clinical study of FDA data

Summary:

Fear is reported as a side effect among people who take Pristiq (desvenlafaxine succinate), especially for people who are female, 50-59 old, have been taking the drug for < 1 month also take Yaz, and have Pain.

The phase IV clinical study analyzes which people have Fear when taking Pristiq. It is created by eHealthMe based on reports of 15,699 people who have side effects when taking Pristiq from the FDA, and is updated regularly.

What is Pristiq?

Pristiq has active ingredients of desvenlafaxine succinate. It is often used in depression. eHealthMe is studying from 19,555 Pristiq users. Check the latest studies of Pristiq.

What is Fear?

Fear is found to be associated with 1,431 drugs and 1,582 conditions by eHealthMe. Check the latest studies of Fear.

On Jul, 03, 2026

15,699 people reported to have side effects when taking Pristiq.
Among them, 80 people (0.51%) have Fear.

Among these 80 people:

How long have people been on Pristiq when they have Fear? *

What is the gender of people who have Fear when taking Pristiq? *

female: 75.32 %
male: 24.68 %

What is the age of people who have Fear when taking Pristiq? *

What are other drugs people take besides Pristiq? *

What are other side effects people have besides Fear? *

Pain: 16 people, 20.00%
Feeling Abnormal: 14 people, 17.50%
Headache (pain in head): 13 people, 16.25%
Dizziness: 12 people, 15.00%
Nervousness: 12 people, 15.00%
Drug Ineffective: 12 people, 15.00%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 12 people, 15.00%
Crying: 12 people, 15.00%
Agitation (state of anxiety or nervous excitement): 12 people, 15.00%
Insomnia (sleeplessness): 11 people, 13.75%

What are the existing conditions these people have? *

Premenstrual Syndrome: 5 people, 6.25%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 5 people, 6.25%
Pain: 5 people, 6.25%
Thyroid Diseases: 4 people, 5.00%
Birth Control: 4 people, 5.00%
High Blood Pressure: 3 people, 3.75%
Insomnia (sleeplessness): 2 people, 2.50%
Panic Disorder: 2 people, 2.50%
Affective Disorder (mental disorder): 2 people, 2.50%
Bipolar I Disorder (mood disorder that is characterized by at least one manic or mixed episode): 2 people, 2.50%

* Approximation only. Some reports may have incomplete information.

Do you take Pristiq and have Fear?

- Check whether Fear 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 Pristiq:

Pristiq (19,555 reports)

Fear treatments and more:

Fear (37,823 reports)

Browse all side effects of Pristiq:

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 Fear:

Fear (1,431 drugs)

Browse all the conditions that are associated with Fear:

Fear (1,582 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on desvenlafaxine succinate (the active ingredients of Pristiq) and Pristiq (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.