Anastrozole and Breast lump - a phase IV clinical study of FDA data

Summary:

Breast lump is reported as a side effect among people who take Anastrozole (anastrozole), especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months also take Kisqali, and have Breast cancer metastatic.

The phase IV clinical study analyzes which people have Breast lump when taking Anastrozole. It is created by eHealthMe based on reports of 21,289 people who have side effects when taking Anastrozole from the FDA, and is updated regularly.

What is Anastrozole?

Anastrozole has active ingredients of anastrozole. It is often used in breast cancer. eHealthMe is studying from 21,893 Anastrozole users. Check the latest studies of Anastrozole.

What is Breast lump?

Breast lump (localized swelling that feels different from the surrounding breast tissue) is found to be associated with 778 drugs and 925 conditions by eHealthMe. Check the latest studies of Breast lump.

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, 26, 2026

21,289 people reported to have side effects when taking Anastrozole.
Among them, 63 people (0.3%) have Breast lump.

Among these 63 people:

How long have people been on Anastrozole when they have Breast lump? *

What is the gender of people who have Breast lump when taking Anastrozole? *

female: 100 %
male: 0.0 %

What is the age of people who have Breast lump when taking Anastrozole? *

What are other drugs people take besides Anastrozole? *

What are other side effects people have besides Breast lump? *

Metastases To Bone (cancer spreads to bone): 15 people, 23.81%
Pain: 14 people, 22.22%
Nausea (feeling of having an urge to vomit): 13 people, 20.63%
Visual Impairment: 12 people, 19.05%
Back Pain: 10 people, 15.87%
Pain In Extremity: 10 people, 15.87%
Stress And Anxiety: 9 people, 14.29%
Dizziness: 9 people, 14.29%
Appetite - Decreased (decreased appetite occurs when you have a reduced desire to eat): 9 people, 14.29%
Breast Pain: 8 people, 12.70%

What are the existing conditions these people have? *

Breast Cancer Metastatic: 9 people, 14.29%
High Blood Pressure: 6 people, 9.52%
Neoplasm Malignant (cancer tumour): 4 people, 6.35%
Breast Cancer Female: 4 people, 6.35%
Diabetes: 3 people, 4.76%
Seizures (abnormal excessive or synchronous neuronal activity in the brain): 2 people, 3.17%
Insomnia (sleeplessness): 2 people, 3.17%
Irritable Bowel Syndrome: 2 people, 3.17%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 2 people, 3.17%
Hormone Level Abnormal: 2 people, 3.17%

* Approximation only. Some reports may have incomplete information.

Do you take Anastrozole and have Breast lump?

- Check whether Breast lump 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 Anastrozole:

Anastrozole (21,893 reports)

Breast lump treatments and more:

Breast lump (9,236 reports)

Browse all side effects of Anastrozole:

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 Breast lump:

Breast lump (778 drugs)

Browse all the conditions that are associated with Breast lump:

Breast lump (925 conditions)

Related publications that referenced our studies

Manjunatha N, Ganjekar S, Mahendra JV, Kilara N, Srinivasa R, "Tardive Dyskinesia Associated With Anastrozole", The Journal of neuropsychiatry and clinical neurosciences, 2013 Jan .
Manjunatha N, Ganjekar S, Mahendra JV, Kilara N, Srinivasa R, "Tardive Dyskinesia Associated With Anastrozole", The Journal of neuropsychiatry and clinical neurosciences, 2013 Jan .

How the study uses the data?

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