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Finasteride

Finasteride 1mg, 5mg

Finasteride is a medication primarily used to treat enlarged prostate gland (benign prostatic hyperplasia) and male pattern baldness. It works by inhibiting the enzyme 5-alpha-reductase, which prevents the conversion of testosterone to dihydrotestosterone (DHT), a hormone linked to prostate growth and hair loss. By reducing DHT levels, Finasteride helps alleviate symptoms of urinary obstruction and can promote hair regrowth in individuals experiencing androgenetic alopecia.

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Description

Finasteride is a medication that belongs to a class of drugs called 5-alpha-reductase inhibitors. It is primarily used to treat conditions related to enlarged prostate (benign prostatic hyperplasia) and male pattern baldness. By inhibiting the enzyme 5-alpha-reductase, Finasteride reduces levels of dihydrotestosterone (DHT), a hormone linked to both conditions, thereby promoting hair growth and improving urinary symptoms.

Uses / Indications

  • Benign prostatic hyperplasia (BPH) – to improve symptoms of urinary flow
  • Male pattern baldness (androgenetic alopecia) – to promote hair regrowth
  • Hormonal therapy in certain cases of prostate cancer (off-label use)

Dosage and Administration

Adults:
For BPH: 5 mg once daily.
For male pattern baldness: 1 mg once daily.

Note: Dosage may vary based on medical condition or doctor’s advice. Consistency in taking the medication is important for best results.

How It Works (Mechanism of Action)

Finasteride works by selectively inhibiting the enzyme 5-alpha-reductase, which converts testosterone into dihydrotestosterone (DHT). By lowering DHT levels, the medication helps to shrink an enlarged prostate and can halt or reverse hair loss in men.

Side Effects

Common side effects:

  • Decreased libido (reduced sexual desire)
  • Erectile dysfunction
  • Decreased ejaculate volume
  • Breast tenderness or enlargement

Rare/serious side effects:

  • Severe allergic reactions (rash, itching, swelling)
  • Breast lumps or changes
  • Mood changes (depression, anxiety)

Seek medical attention if serious side effects occur.

Precautions / Warnings

  • Women who are pregnant or may become pregnant should avoid handling crushed or broken tablets due to potential risks to a male fetus.
  • Discuss any history of liver disease or prostate cancer with your doctor before starting treatment.
  • Regular check-ups, including prostate-specific antigen (PSA) levels, are advised during treatment.

Drug Interactions

May interact with:

  • Other medications that affect hormonal levels
  • Certain antifungal medications (like ketoconazole)
  • CYP3A4 inhibitors and inducers (potentially alter Finasteride metabolism)

Always inform your healthcare provider about any other medications or supplements you’re taking.

Storage Instructions

  • Store at room temperature (20°C–25°C / 68°F–77°F)
  • Keep out of direct light and moisture
  • Keep out of reach of children

Missed Dose / Overdose

Missed a dose?
Take it as soon as you remember. If it’s almost time for your next dose, skip the missed one. Do not double up.

Overdose symptoms:

  • Dizziness
  • Headache
  • Nausea

Contact a poison control center or seek emergency medical help immediately if overdose is suspected.

Contraindications

  • Allergic to Finasteride or any of its components
  • Women who are pregnant or may become pregnant

Brand Names / Alternatives

  • Proscar (for BPH)
  • Propecia (for male pattern baldness)
  • Generic name: Finasteride