Hair loss medications fall into a few groups based on how they work. Knowing the groups makes it easier to understand what a provider might suggest and why. This is an overview for general education, not a guide to choosing or using medication on your own. Every prescription option requires a licensed provider's review.
1. Growth-cycle medications: minoxidil
Minoxidil is thought to prolong the growth phase of the hair cycle and affect blood flow around the follicle. Topical minoxidil is sold over the counter and is FDA-approved for hereditary hair loss in men and women. Oral minoxidil is a prescription blood pressure medication sometimes prescribed off-label for hair loss, and it needs a provider's review because of its effects on blood pressure and the heart. Common topical side effects include scalp irritation and unwanted facial hair where the product spreads. Read minoxidil for women.
2. DHT blockers: finasteride and dutasteride
These 5-alpha reductase inhibitors lower DHT, the hormone that drives follicle shrinkage in pattern hair loss. Oral finasteride is FDA-approved for male pattern hair loss. Dutasteride is FDA-approved for an enlarged prostate and used off-label for hair loss. Both can cause sexual and mood side effects, affect PSA screening results, and must not be taken or handled by anyone who is or may become pregnant. See dutasteride vs finasteride.
3. Anti-androgens: spironolactone
Spironolactone blocks androgen receptors and is used off-label for female pattern hair loss. It can raise potassium levels, lower blood pressure and cause menstrual changes, and it must not be used during pregnancy. See spironolactone for women's hair loss.
4. Supporting ingredients
Some ingredients are used alongside the main medications, usually in compounded topical formulas. Examples include tretinoin (a retinoid sometimes combined with minoxidil), latanoprost, and anti-inflammatory ingredients for scalp conditions. Evidence for these is more limited, and they are generally considered as part of a combined plan. See tretinoin and minoxidil.
5. Medications for other types of hair loss
Some hair loss needs entirely different treatment. Alopecia areata, scarring alopecias, scalp infections and hair loss from thyroid disease or deficiencies are managed differently, often by a dermatologist or other physician in person.
Topical, oral and compounded forms
Many of these medications come in more than one form. Topicals aim to act mainly at the scalp, while oral forms act throughout the body. Compounded formulas are prepared by a licensed pharmacy for an individual patient and can combine ingredients or use a different base. Compounded medications are not FDA-approved. See oral vs topical treatment.
What to expect
For pattern hair loss, the most consistent benefit of medication is slowing or stopping further loss, and some people see partial regrowth. Results vary, change is slow, and most medications only work while they are continued. Providers typically evaluate response over months rather than weeks.
Next step
If you want a licensed provider to review which option, if any, is appropriate for you, start your online consultation.
Prescription required for prescription treatment. A licensed provider decides whether treatment is appropriate. Compounded medications are prepared by a licensed pharmacy for an individual patient and are not FDA-approved. Individual results vary. Prescribed Essence currently serves patients in California, Colorado, Florida and New York.
