Finasteride at the 1 mg strength, fifty film-coated tablets to the pack from Fortune. One milligram is the dermatological concentration, the one associated with male-pattern hair loss rather than with prostate medicine.
The drug inhibits type II 5-alpha-reductase, the enzyme that converts testosterone into dihydrotestosterone in scalp, skin and prostate tissue. Since DHT is what drives follicle miniaturisation in androgenetic alopecia, reducing it addresses the mechanism rather than the appearance. The film coating is functional: it keeps the active from being handled as loose powder.