Hair loss has several causes. Gradual patterned thinning, sudden shedding and patchy loss can call for different evaluations. A dermatologist can examine the scalp and decide whether testing is appropriate.
Minoxidil and finasteride
Topical minoxidil is available over the counter for some patterns of hair loss. Oral minoxidil is prescription-only and used off-label for hair loss. Oral finasteride is FDA-approved for male pattern hair loss. Discuss scalp irritation with topical options, potential blood-pressure effects with oral minoxidil and possible sexual side effects with finasteride.
Comparing online offers
Check whether the price covers one product or a combination, when you will be billed again, and how you can reach the prescriber if you have side effects. Ask whether the product is FDA-approved for the proposed use or compounded.