Common use
Finasteride is a 5-alpha reductase inhibitor primarily used to treat two common conditions in men: benign prostatic hyperplasia (BPH), also known as enlarged prostate, and male pattern baldness (androgenetic alopecia). As a Propecia generic (for hair loss) and Proscar generic (for BPH), finasteride offers an effective and well-studied treatment approach for both conditions. This DHT blocker works by inhibiting the type II 5-alpha reductase enzyme, which is responsible for converting testosterone into dihydrotestosterone (DHT) — the androgen hormone that plays a central role in prostate gland enlargement and progressive hair follicle miniaturization leading to hair loss. By reducing circulating and tissue DHT levels by approximately 70%, finasteride effectively shrinks the enlarged prostate, improves urinary flow and BPH symptoms, and halts or reverses the progression of male pattern baldness. Many patients buy Finasteride online as a proven, once-daily hair loss treatment that can produce visible results within 3 to 6 months of consistent use. For BPH, finasteride reduces the need for surgical intervention and decreases the risk of acute urinary retention. Clinical studies have demonstrated that finasteride can increase hair count, improve hair thickness, and slow further hair loss in the majority of men with androgenetic alopecia when used consistently over time.

Dosage and direction
The recommended dosage of finasteride depends on the condition being treated. For BPH and enlarged prostate symptoms, the standard dose is 5 mg taken orally once daily, with or without food. For male pattern baldness and hair loss treatment, the recommended dose is 1 mg taken orally once daily. Finasteride tablets should be swallowed whole with a glass of water and should not be crushed or broken, particularly because women and children must avoid contact with the active ingredient through skin absorption. The medication should be taken at the same time each day to maintain consistent blood levels. For hair loss, it is important to understand that finasteride requires patience — it typically takes at least 3 months of daily use before initial improvement becomes noticeable, with optimal results generally observed after 6 to 12 months of consistent therapy. Discontinuing finasteride will result in a gradual reversal of benefits over 6 to 12 months, as DHT levels return to baseline. For BPH, clinical improvement in urinary symptoms may be observed within the first few weeks, but maximum benefit typically requires 6 to 12 months of continuous treatment. Your healthcare provider will determine the appropriate dose and treatment duration based on your specific condition and treatment goals.

Precautions
Before starting finasteride, inform your doctor about any liver conditions, urological disorders, or hormonal imbalances. Finasteride can affect the results of the prostate-specific antigen (PSA) blood test used for prostate cancer screening — it typically reduces PSA values by approximately 50%, so your doctor needs to account for this adjustment when interpreting test results. Regular medical check-ups, including digital rectal examinations and PSA testing, are recommended during long-term finasteride use for BPH. Women who are pregnant or may become pregnant must not handle crushed or broken finasteride tablets, as the active ingredient can be absorbed through the skin and may cause birth defects in a developing male fetus, specifically affecting the development of external genitalia. Men taking finasteride should use a condom during sexual intercourse with a pregnant partner or a partner who may become pregnant, as the drug is present in semen. Some patients report persistent sexual side effects even after discontinuing finasteride, a condition sometimes referred to as post-finasteride syndrome, though this remains an area of ongoing research. Discuss any concerns about sexual function openly with your healthcare provider before and during treatment.

Contraindications
Finasteride is strictly contraindicated in women, particularly during pregnancy, as it can cause abnormalities in the external genitalia of a male fetus (hypospadias). It should never be used by children or adolescents. Individuals with known allergy or hypersensitivity to finasteride or any component of the Propecia generic or Proscar generic formulation should not use this medication. Patients with severe liver disease or hepatic impairment should exercise caution and consult their physician, as finasteride is extensively metabolized by the liver and impaired hepatic function may lead to elevated drug levels. Finasteride should not be used by women for hair loss treatment, as its hormonal mechanism of action is specific to male pattern baldness driven by DHT. If you have previously experienced an allergic reaction to dutasteride (another 5-alpha reductase inhibitor), inform your doctor before starting finasteride.

Possible side effect
Side effects of finasteride are generally uncommon but may include decreased libido, erectile dysfunction, and reduced ejaculate volume. These sexual side effects occur in a small percentage of users and are typically reversible upon discontinuation of the medication. Less common side effects include breast tenderness or enlargement (gynecomastia), testicular pain, skin rash, and depression or mood changes. Some patients have reported cognitive effects such as difficulty concentrating or memory concerns. Rare but serious side effects that warrant immediate medical attention include allergic reactions (rash, itching, hives, swelling of the lips, tongue, or face), breast lumps or nipple discharge, and symptoms of male breast cancer. There have been post-marketing reports of persistent sexual dysfunction in some users after discontinuing finasteride, though the causal relationship and prevalence remain under investigation. Report any new, unusual, or persistent symptoms to your healthcare provider promptly for proper evaluation and guidance.

Drug interaction
Finasteride has a relatively low potential for drug interactions compared to many other medications, as it is primarily metabolized by the hepatic CYP3A4 enzyme system but does not significantly inhibit or induce other drug-metabolizing enzymes. However, potent CYP3A4 inhibitors (such as ketoconazole, ritonavir, and itraconazole) may theoretically increase finasteride blood levels, though this interaction is not considered clinically significant at standard doses. CYP3A4 inducers (such as rifampin, carbamazepine, or phenytoin) may reduce finasteride levels, potentially decreasing its effectiveness. Combining finasteride with other medications that affect hormonal levels, such as testosterone replacement therapy or anti-androgen drugs, should be monitored closely by a healthcare provider. Always provide your doctor with a complete list of all prescription medications, over-the-counter drugs, vitamins, herbal supplements, and dietary products you are currently using to ensure safe and effective therapy.

Missed dose
If you miss a dose of finasteride, take it as soon as you remember on the same day. If it is already close to the time for your next dose, skip the missed dose entirely and continue with your regular daily schedule. Do not take two doses at once or take extra medication to compensate for a missed dose. While missing an occasional dose is unlikely to significantly impact long-term results, consistency is key for maintaining the therapeutic benefit of finasteride — particularly for hair loss treatment, where steady DHT suppression is essential for preserving and regrowing hair. If you frequently miss doses, try setting a daily reminder or linking your finasteride to another daily routine activity.

Overdose
An acute overdose of finasteride is unlikely to produce life-threatening symptoms due to the medication's favorable safety profile. However, any suspected overdose should still be reported to a healthcare provider. There is no specific antidote for finasteride, and treatment is supportive and symptomatic. In clinical studies, single doses of up to 400 mg and multiple doses of up to 80 mg daily for 3 months did not produce significant adverse effects. Seek immediate medical attention if a large amount is accidentally ingested, particularly by a woman or child, due to the potential hormonal effects of the medication.

Storage
Store finasteride at controlled room temperature between 15°C and 30°C (59°F to 86°F), protected from moisture, heat, and direct light. Keep the medication in its original container with the lid tightly closed. Do not transfer tablets to other containers. Women who are pregnant or may become pregnant should avoid handling broken or crushed finasteride tablets and should ensure the medication is stored securely out of reach. Keep finasteride out of reach of children and pets, and dispose of expired or unused medication through an approved drug take-back program or as directed by your pharmacist.

Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.