Tylenol and Vasoconstriction - a phase IV clinical study of FDA data

Summary:

Vasoconstriction is reported as a side effect among people who take Tylenol (acetaminophen), especially for people who are female, 50-59 old, have been taking the drug for 6 - 12 months also take Diclofenac, and have Rheumatoid arthritis.

The phase IV clinical study analyzes which people have Vasoconstriction when taking Tylenol. It is created by eHealthMe based on reports of 217,809 people who have side effects when taking Tylenol from the FDA, and is updated regularly.

What is Tylenol?

Tylenol has active ingredients of acetaminophen. It is often used in pain. eHealthMe is studying from 222,310 Tylenol users. Check the latest studies of Tylenol.

What is Vasoconstriction?

Vasoconstriction (constriction of blood vessels, which increases blood pressure) is found to be associated with 110 drugs and 343 conditions by eHealthMe. Check the latest studies of Vasoconstriction.

On Aug, 04, 2026

217,809 people reported to have side effects when taking Tylenol.
Among them, 25 people (0.01%) have Vasoconstriction.

Among these 25 people:

How long have people been on Tylenol when they have Vasoconstriction? *

What is the gender of people who have Vasoconstriction when taking Tylenol? *

female: 84 %
male: 16 %

What is the age of people who have Vasoconstriction when taking Tylenol? *

What are other drugs people take besides Tylenol? *

What are other side effects people have besides Vasoconstriction? *

Haemoglobin Decreased: 9 people, 36.00%
Nasopharyngitis (inflammation of the nasopharynx): 9 people, 36.00%
Thrombocytopenia (decrease of platelets in blood): 8 people, 32.00%
High Blood Pressure: 8 people, 32.00%
Blood Pressure Fluctuation: 8 people, 32.00%
Diarrhea: 7 people, 28.00%
Oxygen Saturation Decreased: 7 people, 28.00%
Poor Venous Access: 7 people, 28.00%
Oropharyngeal Pain: 7 people, 28.00%
Nausea And Vomiting: 7 people, 28.00%

What are the existing conditions these people have? *

Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 7 people, 28.00%
Birth Control: 6 people, 24.00%
Psoriasis (immune-mediated disease that affects the skin): 3 people, 12.00%
Insomnia (sleeplessness): 2 people, 8.00%
Ovarian Cysts (fluid filled sacs of the ovary): 2 people, 8.00%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 2 people, 8.00%
Ulcerative Colitis (inflammatory bowel disease (ibd). it causes swelling, ulcerations, and loss of function of the large intestine): 1 person, 4.00%
Deep Venous Thrombosis (blood clot in a major vein that usually develops in the legs and/or pelvis): 1 person, 4.00%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 1 person, 4.00%
Conjunctivitis Allergic (inflammation of the conjunctiva due to allergy): 1 person, 4.00%

* Approximation only. Some reports may have incomplete information.

Do you take Tylenol and have Vasoconstriction?

- Check whether Vasoconstriction 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 Tylenol:

Tylenol (222,310 reports)

Browse all side effects of Tylenol:

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 Vasoconstriction:

Vasoconstriction (110 drugs)

Browse all the conditions that are associated with Vasoconstriction:

Vasoconstriction (343 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on acetaminophen (the active ingredients of Tylenol) and Tylenol (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.