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Does Finasteride Lower Testosterone? Truth Revealed.

Are you worried about how finasteride affects your testosterone? It’s commonly thought to lower it. However, finasteride might increase testosterone levels by 10-20%. This fact challenges what many think, making us wonder about finasteride’s true effects on the body1. Does Finasteride lower testosterone is a big question as it has many potential side effects.

Finasteride is sold under names like Propecia and Proscar. It treats conditions like benign prostatic hyperplasia (BPH) and male pattern hair loss2. Many studies have looked into how it impacts hormone levels, especially testosterone and dihydrotestosterone (DHT).

A story from one man about his lowered testosterone after using finasteride has made people wary. Yet, diving into scientific studies tells us a different, more detailed story.

Key Takeaways

  • Finasteride is known to elevate testosterone levels by 10-20%, debunking myths about its reduction1.
  • Circulating levels of DHT decrease by around 70% when on finasteride1.
  • The medication is primarily used for BPH and male pattern hair loss under the brands Propecia and Proscar2.
  • Public anecdotes often fuel misconceptions, but research shows a more complex hormonal effect.
  • Consulting healthcare providers is crucial to understanding the potential side effects and benefits1.

The Role of Finasteride in Hormonal Balance

Finasteride is well-known for treating hair loss. It plays a vital part in hormone balance by blocking the 5-alpha-reductase enzyme. This enzyme changes testosterone into dihydrotestosterone (DHT). Stopping it can greatly alter hormone levels in the body.

Understanding Finasteride

Finasteride is mainly used to tackle benign prostatic hyperplasia (BPH) and androgenic alopecia. It stops the 5-alpha-reductase enzyme from turning testosterone into DHT. Research shows finasteride cuts DHT levels by about 70%. This boosts free testosterone levels by 10-20%3.

How It Affects Hormone Levels

Finasteride has a big impact on hormone levels. Studies show men using finasteride had 9-15% more testosterone than others after 3-12 months4. This increase is because it stops testosterone from becoming DHT. It answers the question, “does finasteride increase testosterone?” At the start of finasteride therapy, a surge in testosterone over 20% has been noticed3.

However, constant check-ups are needed as hormone levels can change with long-term use. In the short term, finasteride raised total testosterone by 9.1%. Yet, levels often went back to normal after extended treatment4.

Also, finasteride’s link to hormone balance can cause side effects. About 3-5% of men might face sexual issues like erectile dysfunction and low libido while on finasteride. Luckily, stopping the medication usually reverses these effects4. So, knowing about finasteride and how it might suppress testosterone in some cases is key for good health management.

Does Finasteride Lower Testosterone?

Many think taking finasteride lowers testosterone, but that’s not always true. Taking 5 mg daily for an enlarged prostate can actually raise testosterone levels by 15-25%5. This boost happens because finasteride stops testosterone from turning into dihydrotestosterone (DHT). So, overall testosterone in the body goes up6.

People starting with low testosterone see the biggest increase when they take finasteride5. This fact makes some worry if the drug might have feminizing effects or harm muscle growth. Though there are instances of increased feminizing hormones in some users, these cases aren’t the same for everyone7.

Yet, how finasteride affects folks is really different from person to person. Some feel a drop in testosterone that impacts their mood and strength7. Common side effects like weakness, dizziness, and low sex drive add to the concerns5. This shows why it’s vital to talk it over with a doctor before starting finasteride.

Many wonder about finasteride and its effect on muscle growth, does it hurt it? Since some find their testosterone goes up, it might not harm muscle building. But, everyone’s experiences differ, stressing personalized medical guidance is crucial.

does finasteride lower testosterone

Serum DHT concentration drops by 75% after six months on finasteride6. Although DHT decreases significantly, helping with issues like BPH, testosterone levels generally stay stable. So, most responses to testosterone outside the prostate are unaffected6.

In the end, finasteride’s impact on testosterone and muscle can be complex. Data and personal stories show the results depend a lot on each person’s health and starting point.

The Connection Between Finasteride and DHT

Finasteride is key in handling DHT levels. It does this by blocking the enzyme 5-alpha reductase.

The Enzyme 5-alpha Reductase

5-alpha reductase turns testosterone into DHT. Finasteride attacks this enzyme directly. It cuts down prostatic DHT levels by up to 90% and serum DHT levels by 70%8. It is good for those thinking about its effects on hair growth; thus, leading to questions like “does finasteride regrow hair?”

Impact on DHT and Testosterone Levels

Finasteride lowering 5-alpha reductase means less DHT and more testosterone. Taking 5mg daily can drop DHT by up to 93% and boost testosterone by up to 25%9. But, stopping it might bring DHT levels back and drop testosterone9.

Effects on Hair Loss

Finasteride helps fight hair loss. Studies show 1mg tablets can raise hair count by 107 in a year compared to placebo10. Two years in, and hair count can go up by 138 over placebo levels10.

Fears like “does finasteride 1mg cause cancer” come up due to side effect worries. Even with breast cancer concerns in men, there’s no solid proof it’s caused by finasteride10. About two-thirds of specialists suggest finasteride for male pattern hair loss9, showing its effectiveness.

does finasteride regrow hair

Potential Side Effects and Considerations When Taking Finasteride

When thinking about taking finasteride, know the side effects and precautions. This knowledge helps you choose wisely about your health.

Common Side Effects

Side effects from finasteride are different for everyone. Around 1% to 10% might feel dizzy, get headaches, or feel weak11. Some may have a runny nose or rash. Even less might have low blood pressure or pain in their testicles11. Also, 2% to 38% of men could want sex less12. Women might want sex less too and get headaches12. Always talk to your doctor about these side effects to see if finasteride is right for you.

finasteride side effects

A study showed 1.4% of men taking these drugs had erection problems for more than 90 days after stopping11. This shows why keeping in touch with your doctor is key to manage side effects well.

Long-term Health Implications

Taking finasteride for a long time affects your health. Research suggests it might raise blood sugar and increase diabetes risk in men12. It could also change how your liver and kidneys work12.

For prostate health, it cuts PSA levels in half in six months, which changes prostate cancer diagnosis rates13. Yet, there’s a small chance it raises the risk of serious prostate cancer13.

Men should watch side effects closely and see their doctors often when using finasteride12. If you’re wondering about taking finasteride with testosterone, usually there’s no problem. It can go with testosterone therapy and certain other medicines safely under a doctor’s care11.

Keeping hormones balanced is crucial. Finasteride isn’t recommended for women, especially if pregnant, because of birth defect risks to male babies11. So, women should only use it if a doctor says it’s okay.

Finasteride can be a good choice for treating hair loss and other issues. But, it needs careful use and listening to medical advice. This way, its benefits can be maximized while lowering risks.


Finasteride is often used to manage hair loss but it doesn’t lower testosterone levels directly. Instead, it increases testosterone by stopping its change into DHT. This helps in fighting male pattern baldness14. Studies show that finasteride boosts hair counts and thickness better than placebo treatments in men15.

For those wondering if finasteride changes testosterone levels, research under medical supervision shows positive outcomes.

Yet, we must be aware of the possible side effects, especially those concerning sexual health. Problems like reduced sexual desire and trouble having an erection have been noted but usually go away if the drug is stopped15.

It’s also cool that there are other treatments like Bio-Pilixin®. They can regrow hair without messing with your hormones like finasteride does14.

Talking to healthcare experts is key if you’re thinking about using finasteride. Clinics like Total T Clinic can give great advice and treatments, including TRT and HGH, to tackle aging. Although finasteride helps a lot with hair loss and making your hair thicker, it’s crucial to think about the benefits and risks with a professional.


Does finasteride lower testosterone?

Finasteride often increases testosterone levels. It does this by stopping its change into Dihydrotestosterone (DHT).

How much does finasteride raise testosterone?

In some people, finasteride can boost testosterone levels by around 10-20%. It works by blocking the enzyme that changes testosterone to DHT.

Is finasteride feminizing?

Finasteride usually doesn’t cause feminizing effects. Yet, how people react can differ. So, it’s best to talk to a doctor for advice.

What are the benefits of taking finasteride?

Finasteride mainly combats male pattern baldness. It lowers DHT on the scalp. This can stop hair loss and may even bring back some hair.

Does finasteride increase estrogen?

Finasteride might slightly raise estrogen because testosterone levels go up. But, big issues from higher estrogen are not common.

Does finasteride affect muscle growth?

Muscle growth isn’t directly hit by finasteride. But, changes in testosterone levels might affect muscle size and strength.

Can I take finasteride and testosterone together?

Yes, you can use finasteride and testosterone therapy together. But, a doctor should watch over this to keep hormones in check and look out for side effects.

Does finasteride regrow hair?

Some people see hair regrowth with finasteride. It lowers scalp DHT. This helps stop hair loss from getting worse.

Does finasteride 1mg cause cancer?

Cancer isn’t strongly linked to using finasteride 1mg. Still, talk with your doctor regularly about its long-term effects.

Does finasteride increase testosterone in women?

Women, especially if they might have babies, usually aren’t given finasteride. We don’t know much about its effect on their testosterone levels.

What are the potential side effects of finasteride?

Some might face sexual issues, less desire for sex, or mood swings. These side effects often stop after you quit taking the medicine.

What is the connection between finasteride and 5-alpha-reductase?

Finasteride stops 5-alpha-reductase from working. This enzyme changes testosterone into DHT. Stopping this process is key to treating male pattern baldness.

Source Links

  1. Does Finasteride Lower Testosterone? Unraveling the Truth – Total T Clinic
  2. Finasteride (Oral Route) Side Effects
  3. Does Finasteride Lower Testosterone Levels or Increase Them?
  4. Finasteride and Testosterone: Understanding the Relationship | TIP
  5. Does finasteride lower testosterone? What to know
  6. Finasteride – an overview | ScienceDirect Topics
  7. Finasteride – an overview | ScienceDirect Topics
  8. Finasteride – StatPearls – NCBI Bookshelf
  9. Wimpole Hair Transplant Clinic
  10. Finasteride: 7 things you should know –
  11. Here’s what you need to know about finasteride side effects
  12. Finasteride and Its Side Effects: What You Need to Know – Hair Transplant Specialists – Treatment Rooms London
  13. Finasteride: What to know
  14. Does Finasteride Lower Testosterone?
  15. Exploring the Effectiveness of Finasteride and Testosterone Replacement Therapy in Combating Hair Loss — Hendrx Health

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