How is Finasteride typically administered for hair loss?

• A. Topically
• B. Inhaled
• C. Orally
• D. Intravenously

Answer: (C)

Finasteride lowers scalp DHT by blocking the enzyme that converts testosterone to dihydrotestosterone, and it does so most reliably when the drug is present systemically. Giving it as an oral tablet provides predictable absorption and steady blood levels, which ensures consistent DHT reduction throughout the body, including the scalp where hair follicles respond to lower DHT levels. While topical versions exist, they’re not the standard because absorption from the skin can be inconsistent and less reliable for achieving the needed systemic effect. Inhaled or intravenous routes aren’t used for this purpose since they don’t offer the practical or effective delivery needed to suppress DHT in a consistent, safe way.