Finasteride vs dutasteride: Are topical or compounded versions safer than oral medicines?

Applying a medicine to the scalp does not mean it stays only on the scalp. Topical finasteride or dutasteride can be absorbed into the bloodstream. Side effects beyond the scalp are still possible. Local problems, such as redness, itching, or irritation, may also occur.

The amount absorbed can depend on the formula, the amount used, the application area, and the condition of your skin. Do not apply extra doses or use the product on damaged skin unless your prescriber directs you to do so. Evidence for oral treatment should not be assumed to apply to every topical formula.

Compounded medications are prepared by a licensed pharmacy for one patient and are not FDA-approved. The FDA does not review these products for safety, effectiveness, or quality before they are sold. An approved oral ingredient does not make a compounded topical product FDA-approved.

A licensed physician in your state decides whether a specific treatment is appropriate. Ask about possible body-wide side effects, safe handling, and transfer to other people. Follow the pharmacy's directions for handwashing, drying time, and storage. No topical or oral option guarantees hair growth. Results vary.