This is Generic Finasteride/Propecia by a Thai company called Harifin.It contains the same amount of drug(5mg) as Proscar by MSD but much cheaper.
It is a remedy for baldness in men with mild to moderate hair loss on the top of the head and the front of the mid-scalp area. It increases hair growth, improves hair regrowth, and slows down hair loss. Finasteride works only on scalp hair and does not affect hair on other parts of the body.

You may begin to see improvement as early as 3 months after you begin taking Propecia, but for many men it takes longer. The improvement lasts only as long as you take the drug; if you stop, new hair growth will cease and hair loss will resume.

Finasteride, Propecia is a specific type II 5-alpha reductase inhibitor. That is, it inhibits the enzyme responsible for regulating conversion of testosterone to dihydrotestosterone (DHT). By reducing DHT levels in the scalp, Finasteride decreases DHT's effects on the hair follicles, reversing the process of hair loss. Finasteride decreases DHT concentrations in the serum and the scalp by up to 70% and 60%, respectively.

For maximum benefit, take Finasteride regularly once a day of aprox 1mg(break down 5mg tab to make 4 or 5 doses). It can be taken with or without food.

Dosage for adult men: The recommended Finasteride/Propecia dosage, for men only, is 1 mg daily.

Overdosage: Although no specific information is available on overdose, any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately. If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Do not take 2 doses at the same time.

No significant drug interactions have been reported.

Special information on Finasteride/Propecia, if you are pregnant or breastfeeding avoid even touching the active ingredient in Finasteride/Propecia even if there's a chance that you're pregnant.

Side effects are primarily sexual, and relatively uncommon,they strike one or two men in a hundred. If any side effects develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking.

Side effects may include breast tenderness and enlargement, decreased amount of semen per ejaculation, decreased sex drive, impotence, itching, rash, swelling, testicular pain.