Q. How does Finasteride 1 mg affect male fertility despite increasing the testosterone level?

Answered by
Dr. Sharath Kumar. C
and medically reviewed by Dr. Sneha Kannan
This is a premium question & answer published on Nov 10, 2021

Hello doctor,

If high testosterone levels mean higher sexual drive, how come Finasteride 1 mg causes infertility in men?




Welcome to

Your assumption is not correct.

Finasteride is an oral tablet available in several brand names such as Proscar and Propecia. It is also available as a generic drug in some places.

Uses of Finasteride are;

1) Finasteride is used to treat the symptoms of an enlarged prostate (benign prostate hyperplasia).

2) It is used to treat male pattern hair loss. But Finasteride is not prescribed for women or children.

Mode of Action:

Finasteride decreases the amount of the hormone dihydrotestosterone (DHT). DHT normally causes your prostate to grow larger. The decrease in DHT helps to prevent prostatic growth. It can also lead to increased hair growth in your scalp, but hair growth in other parts of the body are not affected.

Side effects:

The more common side effects of Finasteride include:

• Decreased sex drive.

• Loss of libido.

• Loss of erection.

Ejaculation disorder.

• Increase in breast size and tenderness.

• Skin rashes.

If these effects are mild, they may disappear within a few days. If they are more severe or do not disappear, stop the medicine and consult a specialist doctor.


Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
Why does my sperm not liquefy?

Common in 12 to 29 % of men and can lead to male infertility ...   Read full

Whenever my sister goes out, her skin turns red and itchy. Why?

He has prescribed you the right medication for it, but regarding your hair fall treatment, Finasteride 25 mg is not FDA approved for androgenic alopecia ...   Read full

Does Finasteride cause any sexual problem?

.. sometimes causes erectile dysfunction - erection problem. If it occurs, then it is treatable. In my personal experience, I have seen a few men whose erectile dysfunction has become difficult to treat. Now, it is up to you if you would like to ...   Read full


Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

Management of Coronasomnia
Coronasomnia refers to increased sleep problems among people during the COVID-19 pandemic. Read the below article to get...  Read more»
Balantidiasis - Causes, Signs and Symptoms, Diagnosis, Treatment, and Prevention
Balantidiasis is a rare bacterial infection caused by a parasite called Balantidium coli. Read the article below to know...  Read more»
JAK Inhibitors in Treating Rheumatoid Arthritis
Doctors mainly suggest JAK or Janus kinase inhibitors for patients with rheumatoid arthritis to ease their symptoms. Rea...  Read more»

Ask your health query to a doctor online?

Ask an Infertility Specialist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.