Letrozole and Rectal fissure - a phase IV clinical study of FDA data

Summary:

Rectal fissure is reported as a side effect among people who take Letrozole (letrozole), especially for people who are female, 50-59 old, also take Morphine Sulfate, and have Hypercalcaemia.

The phase IV clinical study analyzes which people have Rectal fissure when taking Letrozole. It is created by eHealthMe based on reports of 53,470 people who have side effects when taking Letrozole from the FDA, and is updated regularly.

What is Letrozole?

Letrozole has active ingredients of letrozole. It is often used in breast cancer. eHealthMe is studying from 54,125 Letrozole users. Check the latest studies of Letrozole.

What is Rectal fissure?

Rectal fissure (painful condition in which a cut or tear occurs in the anus) is found to be associated with 209 drugs and 300 conditions by eHealthMe. Check the latest studies of Rectal fissure.

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

53,470 people reported to have side effects when taking Letrozole.
Among them, 22 people (0.04%) have Rectal fissure.

Among these 22 people:

What is the gender of people who have Rectal fissure when taking Letrozole? *

female: 95.45 %
male: 4.55 %

What is the age of people who have Rectal fissure when taking Letrozole? *

What are other drugs people take besides Letrozole? *

What are other side effects people have besides Rectal fissure? *

Rectal Haemorrhage (bleeding from anus): 22 people, 100.00%
Wound Infection Staphylococcal: 20 people, 90.91%
Exostosis (formation of new bone on the surface of a bone): 20 people, 90.91%
Faecal Incontinence (a lack of control over passing stool): 20 people, 90.91%
Pain In Extremity: 20 people, 90.91%
Pain: 20 people, 90.91%
Osteonecrosis Of Jaw (death of bone of jaw): 20 people, 90.91%
Fever: 20 people, 90.91%
Osteitis (a general term for inflammation of bone): 20 people, 90.91%
Oral Mucosal Exfoliation (removal of mucous membrane of mouth): 20 people, 90.91%

What are the existing conditions these people have? *

Hypercalcaemia (elevated calcium (ca+) level in the blood): 20 people, 90.91%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 1 person, 4.55%
Migraine (headache): 1 person, 4.55%
Metastases To Bone (cancer spreads to bone): 1 person, 4.55%

* Approximation only. Some reports may have incomplete information.

Do you take Letrozole and have Rectal fissure?

- Check whether Rectal fissure 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 Letrozole:

Letrozole (54,125 reports)

Rectal fissure treatments and more:

Rectal fissure (1,022 reports)

Browse all side effects of Letrozole:

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 Rectal fissure:

Rectal fissure (209 drugs)

Browse all the conditions that are associated with Rectal fissure:

Rectal fissure (300 conditions)

How the study uses the data?

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