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Dutasteride, the active ingredient in Avodart capsules, is an FDA-approved medication designed to treat benign prostatic hyperplasia (BPH), or enlarged prostate, in men. This medication reduces prostate size, alleviates urinary symptoms, and lowers the risk of surgery by inhibiting the conversion of testosterone to dihydrotestosterone (DHT). Available in a 0.5 mg capsule form, it should be taken daily with or without food. Dutasteride is not suitable for women, especially during pregnancy, due to potential harm to the fetus. Common side effects include sexual dysfunction, dizziness, and breast changes. Patients should be cautious about potential serious risks such as increased likelihood of a severe form of prostate cancer. Regular medical monitoring, particularly of PSA levels, is crucial to adjust treatment as necessary. Dutasteride should be stored at room temperature, away from moisture, and kept out of reach of children.

Product Overview

Dutasteride, a potent 5-alpha reductase inhibitor, is the active ingredient in Avodart capsules. This medication is primarily used to treat benign prostatic hyperplasia (BPH), a condition commonly known as enlarged prostate, which affects many men as they age. Dutasteride has received FDA approval for its effectiveness in reducing the prostate’s size, which helps alleviate symptoms such as difficulty urinating and reduces the risk of acute urinary retention and the need for prostate surgery. It works by inhibiting the conversion of testosterone to dihydrotestosterone (DHT), a hormone that contributes to prostate growth.

Avodart is available in a 0.5 mg capsule form. It should be taken orally, once daily, with or without food. The capsule must be swallowed whole and not crushed or opened. Dutasteride is suitable for adult men, particularly those diagnosed with BPH. It is not recommended for women, especially those who are pregnant or could become pregnant, as it can cause harm to the fetus.

Users of Dutasteride should be aware of possible side effects, including sexual dysfunction, dizziness, and breast tenderness or enlargement. More severe risks include an increased chance of a more aggressive form of prostate cancer. Precautions are necessary for those with a history of liver issues or undergoing surgery. If a dose is missed, it should be taken as soon as remembered or skipped if it’s near the time for the next dose. In case of an overdose, immediate medical attention is required. Dutasteride should be stored at room temperature, away from moisture and heat, and kept out of reach of children. Patients must follow their doctor’s guidance and regularly monitor their condition through medical tests, particularly PSA levels, to assess the medication’s impact and adjust treatment as necessary.

Uses of Dutasteride

  • Benign prostatic hyperplasia (BPH)

How to Use Dutasteride?


This medication is available as a capsule in the strength of 0.5 mg.

Recommended Dosage for Different Patients

  • Benign Prostatic Hyperplasia (BPH):
    • Usual Adult Dose: 0.5 mg orally once a day.
    • Purpose: Treatment of symptomatic BPH in men with an enlarged prostate to reduce the risk of acute urinary retention (AUR) and BPH-related surgery.
  • Renal Dose Adjustments:
    • No adjustment is recommended for renal impairment.
  • Liver Dose Adjustments:
    • Due to extensive metabolism, dose adjustment may be required in hepatically impaired patients, but no specific guidelines exist. Caution is recommended.

[Note: Remember these recommendations may vary from person to person. Discuss it with your doctor, and they’ll customize your dosage accordingly.]

How to Take It?

  • Pre-Treatment Testing:
    • Your doctor will conduct tests to ensure that you do not have any other conditions that would make you unsafe to use dutasteride.
  • Medication Instructions:
    • Follow all instructions on your prescription label carefully.
    • Read all medication guides or instruction sheets provided with the medicine.
  • Administration Guidelines:
    • Take dutasteride at the same time every day, with or without food.
    • Swallow the capsule whole; do not crush, chew, break, or open it.
  • Treatment Duration and Effectiveness:
    • It may take up to 6 months or longer to see the full benefits of dutasteride.
    • Continue using the medication as directed by your doctor, who will determine the duration of your treatment.
  • Ongoing Monitoring:
    • You will need frequent medical tests to monitor your condition and the effectiveness of the treatment.

[Note: Your doctor will decide the right amount for you based on your condition, following guidelines and studies on the drug. They’ll adjust it as needed over time.]

How Does Dutasteride Work?

Dutasteride works by inhibiting the conversion of testosterone to dihydrotestosterone (DHT), a hormone that contributes to prostate growth. By reducing DHT levels, dutasteride helps to shrink the prostate, alleviate symptoms of benign prostatic hyperplasia (BPH), such as urinary retention, and may also reduce the need for prostate surgery.

Important Safety Information

Side Effects

Common side effects of this medicine may include: 

  • Difficulty achieving or maintaining an erection.
  • Reduced sexual drive.
  • Changes or problems with ejaculation.
  • Swelling or sensitivity in the breast area.
  • Experiencing lightheadedness or fainting spells.

Serious side effects of this medicine:

  • Swelling of the face, throat, or tongue, difficulty breathing, and severe skin rash.
  • Heart failure has been reported in some patients, characterized by shortness of breath, prolonged swelling of the legs or feet, and unusual tiredness.
  • Persistent erectile dysfunction and decreased libido may continue after stopping the medication.
  • Mood changes, including new or worsening depression.
  • Pain, tenderness, or enlargement of breast tissue, sometimes accompanied by nipple discharge, which could indicate a rare form of breast cancer.
  • Although dutasteride can lower the overall risk of prostate cancer, it may increase the risk of developing high-grade prostate cancer.

[Note: Remember, this list may not cover all possible side effects. Always consult with your healthcare giver for medical advice about side effects.]


    • Pregnancy Risk and Handling: Women who are pregnant or could become pregnant should not handle dutasteride (Avodart) capsules. The medication can be absorbed through the skin, potentially harming the fetus. If contact with a leaking capsule occurs, wash the area immediately with soap and water.
    • Impact on Prostate-Specific Antigen (PSA) Levels: Dutasteride (Avodart) may lower PSA levels, which are commonly used to screen for prostate cancer. This reduction could influence prostate cancer test results. Patients should have their PSA levels checked at least three months after starting the medication to establish a new baseline, with ongoing monitoring afterward.
  • Increased Risk of High-Grade Prostate Cancer: There is a potential increased risk of developing a more severe form of prostate cancer with dutasteride use. In a study of men aged 50 to 75, approximately 1% of those taking dutasteride were diagnosed with this form of cancer. Discuss any concerns with your healthcare provider.
  • Blood Donation Restrictions: Do not donate blood during treatment and for at least six months after completing treatment with dutasteride (Avodart). The medication can remain in your blood for an extended period and, if transfused to a pregnant woman, could cause harm to the fetus.
  • Effects on Semen: The use of dutasteride for one year has been associated with lower sperm counts and other changes in semen. The impact of these changes on fertility is not clear. If you have concerns about fertility, it is important to talk to your healthcare provider.


  • Allergies:
    • Inform your doctor or pharmacist if you have allergies to dutasteride, tamsulosin, finasteride, or any other allergies.
    • This medication may contain inactive ingredients that can cause allergic reactions.
  • Medical History:
    • Disclose your complete medical history to your healthcare provider, particularly if you have had low blood pressure or eye problems like cataracts or glaucoma.
  • Alcohol and Marijuana Use:
    • Dutasteride can cause dizziness or drowsiness.
    • Avoid driving, operating machinery, or performing tasks requiring alertness until you can do so safely.
    • Limit alcohol consumption and discuss with your doctor if you use marijuana.
  • Surgical Precautions:
    • Before undergoing any surgery, including eye surgery for cataracts or glaucoma, inform your surgeon that you are taking dutasteride. Also, mention all other medications you use, including over-the-counter drugs and herbal products.
  • Risks for Older Adults:
    • Older adults may be more prone to experiencing side effects such as dizziness and low blood pressure, especially when rising from a seated or lying position, which can increase the risk of falls.
  • Blood Donation:
    • Do not donate blood while taking this medication and for at least 6 months after stopping to avoid the risk of transfusion to a pregnant woman.
  • Use in Women:
    • Dutasteride is not recommended for use in women, particularly during pregnancy or breastfeeding, as it may harm the baby.
    • Consult your doctor for more information if you are a woman using this medication.


  • Currently pregnant
  • Allergy to other 5 alpha-reductase inhibitors

Missed Dose

If you miss a dose of Dutasteride, take it as soon as you remember. However, if it’s almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for the missed one. This helps maintain the medication’s effectiveness while preventing potential overdose issues.

[Note: If you have missed a medication dose and are unsure when to take the next one, immediately consult your doctor or pharmacist.]


In case of an overdose of Dutasteride, taking prompt action is crucial. As this medication can have serious aftereffects, such as passing out or trouble breathing. Symptoms may include severe dizziness or fainting. 

[Note: If you consumed more than the recommended dose, get medical help immediately, or call the Poison Help line at 1-800-222-1222.]


  • Store it at room temperature and away from excess heat and moisture (not in the bathroom).
  • Avoid freezing.
  • Keep it out of the reach of children.
  • Dispose of any capsules that are deformed, discolored, or leaky.

[Note: Discuss with your healthcare professional about the proper disposal of any unused medicine and any questions you may have regarding its storage.]

Dutasteride Interactions

  • Antiviral medications for HIV/AIDS: These can alter the metabolism of dutasteride.
  • Boceprevir: Commonly used in hepatitis C treatment, it can also change how dutasteride is metabolized.
  • Antifungals like ketoconazole, itraconazole, voriconazole: These can increase blood levels of dutasteride, potentially leading to increased side effects.
  • Macrolide antibiotics such as erythromycin and telithromycin: These can interfere with the breakdown of dutasteride in the body.
  • Cimetidine: Used to treat heartburn and stomach ulcers, it can increase dutasteride concentration.
  • Diltiazem and Verapamil: These heart medications can also increase dutasteride concentration.
  • Saw palmetto and other dietary supplements: There could be interactions, though the specifics are unclear.

[Note: This isn’t a complete list, and there could be other drugs that interact with Dutasteride. Make sure to tell your doctor about any prescription, over-the-counter medicines, and herbal products you’re taking.]

Dutasteride  Alternatives

[Note: Your doctor will choose what’s best for you. Don’t use any of these alternative medications without consulting your healthcare provider. Taking them by yourself may cause serious side effects.] 

Frequently Asked Questions

Is there a specific time of day that Dutasteride should be taken? 

Dutasteride can be taken at any time of day, but it’s most effective if taken consistently at the same time each day. If you are taking other prostate medications, such as tamsulosin (Flomax), it’s advisable to take them concurrently. Consult with your healthcare provider or pharmacist for tailored advice on the best time to take your medications.

Can Dutasteride help with hair regrowth? 

Dutasteride is not FDA-approved for treating hair loss, unlike finasteride (Propecia), another medication from the same class. However, some studies suggest that dutasteride might be effective for male pattern baldness due to its ability to block DHT, a hormone implicated in hair loss. More research is necessary to confirm its safety and effectiveness for this use. If you’re considering treatment options for hair loss, consult your healthcare provider.

How long does Dutasteride remain in your system after stopping? 

Dutasteride has a long duration in the body, potentially staying up to six months. Due to this, donating blood is not advised for at least six months post your last dose to avoid the risk of exposing the medication to a pregnant woman through a transfusion, which could harm the fetus.

How quickly does Dutasteride start to improve prostate symptoms? 

Improvements may be noticeable as early as three months after starting the medication, but it’s generally recommended to continue treatment for at least six months to assess its effectiveness fully. If there’s no improvement in symptoms after a few months, it’s important to consult with your healthcare provider to explore other treatment options that may be more effective.

Does Dutasteride reduce prostate size? 

Yes, Dutasteride effectively lowers dihydrotestosterone (DHT) levels, which contributes to prostate growth. Clinical studies have shown that dutasteride can significantly reduce prostate size compared to a placebo, helping to alleviate symptoms of benign prostatic hyperplasia (BPH), such as difficulty urinating.

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