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Finasteride in Japan: Product Differences, Costs and Consultation Checks
This guide to Finasteride in Japan covers hair-loss effects, approved single-ingredient products and treatment limitations. It separates medicine-specific information from the product and prescription checks needed for an individual consultation.
This page explains how Finasteride works, its directions, limitations and safety. For prices and individual prescriptions, see SWIFT’s relevant care information.
Finasteride slows the progression of male pattern hair loss. It is assessed with continued daily use, but is not a medicine for female hair loss or every form of alopecia. Distinguish oral combinations from approved Japanese single-ingredient products.
Medical reviewer: Masashi Morita, MD
Finasteride slows the progression of male pattern hair loss. It is assessed with continued daily use, but is not a medicine for female hair loss or every form of alopecia. Distinguish oral combinations from approved Japanese single-ingredient products.
- Ingredient/class
- Finasteride
- Eligible patients/indications
- The approved indication in Japan is delaying progression of androgenetic alopecia in men. It is not indicated for other alopecias or for women. Efficacy and safety below age 20 are not established; do not take it on your own initiative.
- Assessing effects
- Changes may occur by 3 months, but effects are usually assessed after 6 months of continued use. The prescribing information calls for discontinuation if there is no slowing of progression after at least 6 months. A doctor assesses the response and whether treatment should stop or continue.
- Clinic care
- Service information supported by public sources is identified in the article. Final prescribing decisions are made during consultation.
What the medicine is
It inhibits type 2 5α-reductase and reduces DHT production. It suppresses an action involved in AGA; it is not a supplement that directly supplies nutrients to hair roots.
Eligible patients and approved indications
The approved indication in Japan is delaying progression of androgenetic alopecia in men. It is not indicated for other alopecias or for women. Efficacy and safety below age 20 are not established; do not take it on your own initiative.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
Treatment limitations and when diagnosis is needed
It does not guarantee full restoration of existing thinning. Alopecia areata, sudden loss and inflamed scalp require a different diagnosis. Increased benefit from dose escalation has not been confirmed.
Formulations and basic directions
The approved Japanese single-ingredient directions for adult men are 0.2 mg once daily, increased if necessary to no more than 1 mg daily. Avoid splitting or crushing. For the clinic’s minoxidil combination, a single-ingredient label alone does not complete the safety explanation; check prescribing instructions for all ingredients.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
Timing of response and decisions about continuation
Changes may occur by 3 months, but effects are usually assessed after 6 months of continued use. The prescribing information calls for discontinuation if there is no slowing of progression after at least 6 months. A doctor assesses the response and whether treatment should stop or continue.
Side effects and symptoms to watch for
Watch for reduced libido and changes in erectile or ejaculatory function. Liver dysfunction and hypersensitivity have also been reported. The prescribing information includes suicide-related reports, including those with unclear causality; do not leave depressed mood or marked anxiety unaddressed.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
When to stop and seek medical attention
For jaundice, marked fatigue or swelling of the face or throat, do not take additional doses; seek medical attention. Stop taking the medicine and contact a doctor promptly if suicidal thoughts or a suicide attempt occur. Tell the doctor about a history of depression, suicidal thoughts or suicide attempts.
Restrictions and interactions
Hypersensitivity to an ingredient, pregnancy or possible pregnancy, and breastfeeding are contraindications. Disclose past liver disease and other AGA medicines. It lowers PSA values; disclose use when undergoing a PSA test.
Source: Medicine-specific primary documentation. The product used by the clinic is not assumed to be identical to the formulation in this documentation.
Pregnancy, breastfeeding and patient precautions
Women who are pregnant, may be pregnant or are breastfeeding should not handle broken or crushed tablets because of potential effects on a male fetus. Distinguish handling of intact coated tablets from damaged tablets.
Additional care
Do not increase the dose; monitor with photographs and examination findings. Do not add oral minoxidil to a combination tablet that already contains it.
Storage and quality checks
Japanese single-ingredient products are stored at room temperature. Keep tablets intact in the original packaging and prevent handling by children or family members for whom they are not intended. Check the actual label for the clinic’s combination product.
Differences from other medicines and treatments
Dutasteride acts on type 1 and type 2 5α-reductase. Topical minoxidil has a different action; suitability of combinations is assessed during consultation. Do not conflate approval status of single-ingredient products and combinations containing an unapproved oral ingredient.
Looking for finasteride in Japan? Compare the product before the price
If you are looking for finasteride in Japan or comparing its cost, first check whether the listing is for a single-ingredient tablet or a combination containing minoxidil. Propecia, a generic tablet and a combination product should not be treated as the same offer just because the name finasteride appears.
Have the name and strength of your current medicine ready. Before booking, check the proposed product, quantity, consultation charge and any collection or delivery cost. The linked English care page explains SWIFT’s consultation route and published charges; confirm current conditions with the clinic. An appointment does not guarantee a prescription, a particular brand or stock.
Discussing consultation and prescribing with SWIFT
SWIFT’s official information lists single-ingredient medicines and combinations containing minoxidil. Confirm each product’s approval status, ingredients, actual prescribed formulation, strength and current costs during consultation.
Frequently asked questions
For Finasteride, does it differ from Propecia?
Propecia is a brand name for single-ingredient finasteride. Distinguish ingredient names, brand names and combination products.
For Finasteride, can I increase above 1 mg?
The Japanese AGA dose limit is 1 mg daily. Do not increase the dose yourself.
For Finasteride, how long do I take it?
Continuing treatment is needed to maintain benefit, but periodically assess effects and side effects to determine whether it remains necessary.
Where can I check finasteride prices and the consultation process in Japan?
Use the linked English care page for SWIFT’s published fees and consultation route. Compare the actual formulation, strength and quantity, and ask which other charges apply. This article explains the medicine; it does not confirm that a particular imported or branded product will be supplied.
Medical supervision
Dr Masashi Morita (Board-certified specialist and supervising physician, Japanese Urological Association / Board-certified specialist, Japan Endocrine Society / Doctor of Medical Science).