Finasteride Medications

Finasteride Info

What is Finasteride?

Finasteride belongs to a group of medicines called 5-alpha-reductase inhibitors. It works by reducing the amount of a hormone that can shrink tiny hair follicles or enlarge the prostate gland. In Hong Kong, finasteride is available as both generic tablets and branded products such as Fincar, Proscar, Propecia, Finpecia and the plain-named finasteride tablets.

Medications with Finasteride

Finasteride appears in several products that you may see on a pharmacy shelf or in a prescription:

• Fincar - a brand marketed for treating enlarged prostate.
• Proscar - another brand aimed at the same prostate condition.
• Propecia - a brand widely known for hair-loss treatment in men.
• Finpecia - a local brand used for similar hair-loss purposes.
• Finasteride - the generic name, sold as tablets in various strengths.

These medicines come mainly as oral tablets, although the exact strength can differ from product to product. All are approved for sale in Hong Kong by the Pharmacy and Poisons Board under the Department of Health.

What Does Finasteride Treat?

Finasteride is prescribed for a small set of conditions where hormone-related growth changes are a factor.

• Benign prostatic hyperplasia (BPH) - a non-cancerous enlargement of the prostate that can cause urinary difficulties. Lowering the hormone level helps the prostate shrink, easing symptoms.
• Male-pattern hair loss (androgenetic alopecia) - thinning hair on the scalp, especially at the crown and front. Reducing the hormone that harms hair follicles can slow or partially reverse loss.
• Post-surgical prostate care - sometimes used after prostate surgery to keep the gland from growing again.
• Off-label use in some skin conditions - a few doctors may consider it for severe acne or hirsutism, but this is not a standard indication in Hong Kong.

People who benefit most are adult men who experience the above problems. Finasteride is not intended for use in women or children.

How Finasteride Works

Finasteride blocks an enzyme that turns testosterone into dihydrotestosterone (DHT). DHT is the hormone that makes the prostate grow larger and the hair follicles shrink. By keeping DHT levels down, the drug helps the prostate return toward a normal size and allows hair follicles to stay healthier. Effects on the prostate may be noticed within a few weeks, while visible hair improvement often takes several months.

Safety Information

Common Side Effects

Most users experience only mild, short-lasting effects. Typical reports include:

• A small decrease in sexual desire
• Slight difficulty achieving an erection
• Minor breast tenderness or enlargement

These symptoms often improve on their own and do not require medical intervention.

Serious Reactions

Rarely, finasteride can cause more severe problems. Seek urgent medical help if you notice:

• Swelling of the face, lips, tongue, or throat with breathing difficulty
• Sudden rash, itching, or hives that spread quickly
• Unexplained breast lumps or discharge

These signs may indicate an allergic reaction or a serious underlying issue.

Who Should Be Cautious

Finasteride should be avoided or used with caution in specific situations:

• Women who are pregnant or may become pregnant - the drug can affect a male fetus.
• Individuals with a known allergy to finasteride or any component of the tablet.
• Men with liver disease, as the medication is processed in the liver.

Discuss any existing health conditions with a qualified professional before starting a finasteride product.

Interaction Awareness

Finasteride can interact with certain medicines and lifestyle factors:

• Hormone therapies - drugs that influence testosterone or estrogen levels may alter finasteride’s effect.
• Alcohol - excessive drinking can stress the liver, where finasteride is broken down.
• Driving or operating machinery - if you notice dizziness or reduced focus, be cautious.

For a full list of possible interactions, refer to the detailed information provided with each specific finasteride medication.

What to Know Before Using

Store finasteride tablets in a cool, dry place away from direct sunlight. The usual treatment course differs: some people take the medication for a few months (e.g., hair loss), while others may need it for several years (e.g., enlarged prostate). Always follow the instructions that come with your particular product. For detailed usage, dosing, and administration, refer to your specific medication’s information.

Key Terms

Benign prostatic hyperplasia (BPH): Non-cancerous growth of the prostate that can cause urinary symptoms.

Androgenetic alopecia: The most common form of hair loss in men, linked to hormones.

Dihydrotestosterone (DHT): A hormone derived from testosterone that influences prostate size and hair growth.

Information Disclaimer

This article offers general educational information about finasteride as an active substance used in various medicines. Its purpose is to help patients better understand the ingredient and the conditions it is used to treat. It is not a substitute for professional medical advice or for the specific instructions provided with individual products. Medicines containing finasteride may differ in formulation, strength, and directions for use. Always consult the labeling of your particular medication and follow your healthcare provider’s guidance for complete information on proper use, dosage, and safety.