What is Finasteride?
Finasteride is a prescription tablet used to treat male pattern hair loss, also known as androgenetic alopecia. This condition causes thinning of the hair on the scalp, especially at the crown and the middle of the head.
Doctors also prescribe finasteride to men with benign prostatic hyperplasia (BPH), which means the prostate gland is enlarged.
This condition can make urination difficult. Finasteride can help shrink the prostate, relieve symptoms like frequent urination, and reduce the chance of needing surgery.
Finasteride is only for men. Women and children should not take this treatment. Women who are pregnant or may become pregnant must not touch broken or crushed tablets. The active ingredient can harm an unborn baby, especially a male baby. If contact occurs, wash the affected area immediately with soap and water, and then contact a healthcare provider.
Indications and Benefits of Finasteride
Finasteride is used to treat two main conditions in men.
It helps manage male pattern hair loss, also known as androgenetic alopecia, by slowing down hair thinning and encouraging regrowth on the scalp.
It is also used to treat benign prostatic hyperplasia (BPH), which means the prostate is enlarged.
Finasteride helps reduce the size of the prostate, making it easier to pass urine and lowering the chance of needing surgery.
What Are the Benefits of Finasteride?
- Finasteride helps slow down hair loss in men with male pattern baldness.
- It may support hair regrowth on the crown and mid-scalp area.
- It lowers levels of DHT, a hormone that causes hair follicles to shrink and thin.
- It can reduce the size of an enlarged prostate in men with BPH.
- It helps improve urinary flow and reduces the urge to urinate often, especially at night.
- It lowers the risk of sudden blockage of urine flow.
- It may reduce the need for surgery related to BPH.
- It can be taken as a once-daily tablet, making it easy to use.
How It Works
Finasteride helps slow down hair loss and may improve hair growth in men by lowering levels of a hormone called DHT (dihydrotestosterone). High levels of DHT can shrink hair follicles, leading to hair loss.
By reducing DHT, finasteride supports healthy hair growth over time.
Finasteride is not effective for hair loss at the temples or receding hairlines. It is also not intended for use by women for any purpose.
Talk to your doctor before starting finasteride, especially if you have liver problems or take other supplements or treatments.
Dosage
Finasteride is taken orally once a day and is available in two strengths. The right dose depends on what you are using it for: either to treat hair loss or to help with an enlarged prostate.
You can take it with or without food. Try to take it at the same time every day to keep a steady level in your body. You may need to use it for at least three months before you see results.
If you stop using it, the effects may gradually subside over approximately a year.
Available Strengths of Finasteride
- 1 mg tablet (also known by the brand Propecia): This is used to treat male pattern hair loss. It works by slowing down hair thinning and may help hair grow back.
- 5 mg tablet (also known by the brand Proscar): This is used to treat benign prostatic hyperplasia (BPH), which means the prostate gland is larger than normal and may cause problems like trouble peeing.
Recommended Dosage Chart
| Condition | Dosage | How Often | Who Can Use It | What You Should Know |
| Hair loss in men | 1 mg tablet | Once a day | Men aged 18 to 41 | Best for thinning hair on the top and middle of the scalp. Use daily for at least 3 months. |
| Enlarged prostate (BPH) | 5 mg tablet | Once a day | Adult men | Helps shrink the prostate, which may improve urine flow and reduce the urge to pee often. |
| Hair maintenance | 1 mg tablet | Once a day | Adult men | If you stop taking it, hair loss may return within 12 months. |
| BPH with an alpha-blocker | 5 mg tablet | Once a day | Adult men with BPH | It can be taken with doxazosin (a medicine that relaxes the muscles in the prostate and bladder). |
Usage Guide
Taking finasteride the right way helps you get the best results, whether you are using it for hair loss or an enlarged prostate.
This treatment works slowly over time, so take it regularly to maintain its effects. Do not take more than the recommended dose, and do not stop taking it without consulting your doctor first.
How to take finasteride?
- Take one tablet by mouth each day.
- You can take finasteride with or without food.
- Try to take it at the same time every day so you do not forget.
- If you miss a dose, do not take an extra tablet. Just take the next one as scheduled.
- Do not take more than one tablet in a day. Taking more does not make it work faster.
- Do not share your tablets with anyone else. This treatment is intended only for the person to whom it was prescribed.
- Continue taking it every day, even if you don’t see results right away. It may take 3 months or more to see a difference.
Side Effects
Finasteride may cause side effects in some men. Many experience only mild or common side effects of finasteride, but others may face more serious health concerns.
Consult your doctor if you experience any side effects, especially if they persist or worsen over time.
Common Side Effects of Finasteride
- trouble getting or keeping an erection
- lower sex drive
- reduced amount of semen
- problems with ejaculation
- enlarged breasts
- breast pain
These finasteride sexual side effects are among the most reported in men using the treatment for hair loss or prostate issues.
Severe Side Effects
- lumps in the breast
- nipple discharge
- allergic reactions
- skin rash
- itching
- hives
- swelling of lips, tongue, throat, or face
- testicle pain
- ongoing erection problems after stopping
- ongoing ejaculation problems after stopping
- male infertility
- poor sperm quality
- depression
- ongoing low sex drive after stopping
- male breast cancer
- higher risk of serious prostate cancer
These are considered long-term effects of finasteride and may affect fertility, mental health, or increase cancer risk. Speak with your doctor if you have concerns, especially if you are experiencing finasteride and fertility issues or signs of finasteride depression.
Missed Dose
If you forget to take a dose of finasteride, just skip it and take your next dose at the usual time.
Do not take two tablets to make up for the missed dose. Taking more than the recommended dose will not make the treatment work faster and may increase the risk of side effects.
To avoid missing a dose, try to take finasteride at the same time every day. This helps keep a steady level in your body for the best results.
Overdose
If you or someone else takes too much finasteride, get medical help right away. Taking more than the recommended dose will not improve results and may lead to harmful effects.
Follow your doctor’s instructions and keep finasteride out of reach of children. If you are unsure how much you took, it is safer to seek medical advice as soon as possible.
Warnings
- Finasteride is only for use in men and should never be used by women or children.
- Pregnant women or women who may become pregnant must not handle crushed or broken finasteride tablets. The active ingredient can be absorbed through the skin and may harm an male unborn baby.
- Finasteride may lower PSA levels, which is a blood test used to check for prostate problems. This can make it harder to detect prostate cancer early. Doctors need to know you are taking finasteride before interpreting your PSA test results.
- National Cancer Institute’s study stated that a rise in PSA levels during treatment may be a sign of prostate cancer and should be checked by your doctor, even if the PSA level is still in the normal range.
- Men over 55 who take finasteride may have a slightly higher chance of developing a serious type of prostate cancer called high-grade prostate cancer.
- Finasteride is not approved for use in children or teenagers.
- Always take finasteride exactly as prescribed to avoid inaccurate test results and possible health risks.
- Do not take extra doses if you miss one. Taking more than recommended does not improve results and may increase side effects.
- Tell your doctor about all other treatments and supplements you are using before starting finasteride.
- If you have liver problems or a history of prostate disease, discuss this with your doctor before using finasteride.
Boxed Warning and Precautions for Finasteride
| WARNING: Women who are pregnant or may become pregnant must not handle broken or crushed finasteride tablets. The active ingredient may be absorbed through the skin and can cause congenital disabilities in a male baby. Finasteride may also affect PSA levels used to screen for prostate cancer. In some older men, it may increase the risk of developing a serious type of prostate cancer. Always use finasteride exactly as directed by your healthcare provider. |
Contraindications
You should not take finasteride if you are a woman who is pregnant or may become pregnant.
Finasteride can harm an unborn baby, especially if the baby is male. It may cause changes to the baby’s sex organs while developing in the womb.
If a pregnant woman accidentally touches a broken or crushed tablet, the active ingredient may pass through the skin and reach the baby. That is why women who are or may become pregnant must avoid handling finasteride tablets that are not whole.
Doctors do not prescribe finasteride to women or children. This treatment is intended for use in adult men only.
You should also avoid finasteride if you are allergic to any of its ingredients. An allergic reaction can include swelling, rash, itching, or trouble breathing.
If you have ever experienced a reaction to finasteride or similar treatments, please inform your doctor before starting.
Interactions
Finasteride has no major known drug interactions, and studies indicate that it does not interfere with the effectiveness of most other treatments in the body.
However, it is still important to tell your doctor about everything you take, including prescription drugs, over-the-counter medications, vitamins, and herbal supplements.
This helps avoid unexpected side effects or changes in how your treatment works.
- digoxin
- propranolol
- warfarin
- theophylline
- antipyrine
- acetaminophen (Tylenol)
- acetylsalicylic acid (Aspirin)
- ACE inhibitors (such as enalapril, lisinopril)
- alpha-blockers (such as doxazosin)
- beta blockers (such as atenolol, metoprolol)
- calcium-channel blockers (such as amlodipine, diltiazem)
- diuretics (such as furosemide, hydrochlorothiazide)
- cardiac nitrates (such as nitroglycerin)
- H2 blockers (such as ranitidine, famotidine)
- statins or HMG-CoA reductase inhibitors (such as atorvastatin, simvastatin)
- NSAIDs (such as ibuprofen, naproxen)
- anticonvulsants (such as phenytoin, valproic acid)
- benzodiazepines (such as diazepam, lorazepam)
- quinolone antibiotics (such as ciprofloxacin, levofloxacin)
Storage
Store finasteride tablets at room temperature between 20 and 25 degrees Celsius or 68 to 77 degrees Fahrenheit. Keep the tablets in a tightly closed container that protects them from light and moisture.
Do not use tablets that are broken or crushed. Women who are pregnant or may become pregnant should not touch broken or crushed tablets because the active ingredient may harm an unborn baby.
The tablets are coated to prevent contact with the ingredient during normal handling as long as they are not damaged. Always keep finasteride out of the reach of children and do not store it in areas with high heat or humidity, such as bathrooms or near kitchen sinks.
Alternatives
If finasteride is not the right option for you, other treatments are available that may help with similar conditions, such as male pattern hair loss (androgenetic alopecia) or benign prostatic hyperplasia (BPH).
These alternatives work in different ways and may be prescribed based on your specific health needs. Consult your doctor before switching treatments to find the safest and most effective option for you.
- Dutasteride
- Minoxidil topical
- Ketoconazole topical
- Flomax (tamsulosin)
- Avodart (dutasteride)
- Rogaine (minoxidil)
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Disclaimer
Pharma Giant provides medical information to help you better understand medications and medical conditions.This content is for informational use only and does not replace advice from a licensed medical practitioner. Consult your doctor or pharmacist before starting or changing any medication. All our partners follow strict safety standards set by their country’s health authorities to make sure you receive safe and high-quality medications.
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