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

Summary:

Breast lump is reported as a side effect among people who take Proscar (finasteride), especially for people who are male, 60+ old, have been taking the drug for 6 - 12 months also take Finasteride, and have Prostatomegaly.

The phase IV clinical study analyzes which people have Breast lump when taking Proscar. It is created by eHealthMe based on reports of 13,025 people who have side effects when taking Proscar from the FDA, and is updated regularly.

What is Proscar?

Proscar has active ingredients of finasteride. It is often used in prostate examination abnormal. eHealthMe is studying from 13,379 Proscar users. Check the latest studies of Proscar.

What is Breast lump?

Breast lump (localized swelling that feels different from the surrounding breast tissue) is found to be associated with 779 drugs and 925 conditions by eHealthMe. Check the latest studies of Breast lump.



On Aug, 04, 2026

13,025 people reported to have side effects when taking Proscar.
Among them, 39 people (0.3%) have Breast lump.

Could Proscar cause Breast lump?

Among these 39 people:

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

  • < 1 month: 0.0 %
  • 1 - 6 months: 18.75 %
  • 6 - 12 months: 25.0 %
  • 1 - 2 years: 6.25 %
  • 2 - 5 years: 25.0 %
  • 5 - 10 years: 18.75 %
  • 10+ years: 6.25 %

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

  • female: 5.41 %
  • male: 94.59 %

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

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 4 %
  • 40-49: 0.0 %
  • 50-59: 4 %
  • 60+: 92 %

What are other drugs people take besides Proscar? *

  1. Finasteride: 5 people, 12.82%
  2. Propecia: 4 people, 10.26%
  3. Viagra: 4 people, 10.26%
  4. Atenolol: 4 people, 10.26%
  5. Folic Acid: 2 people, 5.13%
  6. Lipitor: 2 people, 5.13%
  7. Calcium: 2 people, 5.13%
  8. Lasix: 2 people, 5.13%
  9. Nexium: 2 people, 5.13%
  10. Avodart: 2 people, 5.13%

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

  1. Gynecomastia (enlargement of the gland tissue of the male breast): 17 people, 43.59%
  2. Breast Pain: 9 people, 23.08%
  3. Erection Problems: 8 people, 20.51%
  4. Depression: 7 people, 17.95%
  5. Chest Pain: 6 people, 15.38%
  6. Joint Pain: 5 people, 12.82%
  7. Stress And Anxiety: 5 people, 12.82%
  8. Dizziness: 5 people, 12.82%
  9. High Blood Pressure: 4 people, 10.26%
  10. Fatigue (feeling of tiredness): 4 people, 10.26%

What are the existing conditions these people have? *

  1. Prostatomegaly (enlargement of the prostate): 4 people, 10.26%
  2. Androgenetic Alopecia (common form of hair loss): 3 people, 7.69%
  3. Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 1 person, 2.56%
  4. Prostatitis (inflammation of the prostate gland): 1 person, 2.56%
  5. Proctalgia (pain in the rectum): 1 person, 2.56%
  6. Osteoporosis (bones weak and more likely to break): 1 person, 2.56%
  7. Hypersensitivity: 1 person, 2.56%
  8. High Blood Pressure: 1 person, 2.56%
  9. Hair Disorder: 1 person, 2.56%
  10. Gastric Cancer Stage Iii (the tumour has invaded nearby organs, such as the liver, colon, or spleen. cancer cells have not spread to lymph nodes or to distant organs): 1 person, 2.56%

* Approximation only. Some reports may have incomplete information.

Do you take Proscar 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 Proscar:

Breast lump treatments and more:

How severe was Breast lump and when was it recovered:

Expand to all the drugs that have ingredients of finasteride:

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Proscar:

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:

Browse all the conditions that are associated with Breast lump:

Related publications that referenced our studies


How the study uses the data?

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



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