Finasteride is the most clinically proven oral medication for male pattern hair loss, stopping further loss in 83 percent of men who take it for two years. Physician-prescribed through Eros MD with ongoing provider support.
about finasteride
Finasteride is a 5-alpha reductase inhibitor, a medication that works by blocking the enzyme responsible for converting testosterone into dihydrotestosterone (DHT). DHT is the primary hormonal driver of male pattern baldness. In genetically predisposed men, DHT binds to receptors in hair follicles and causes progressive follicular miniaturization, eventually leading to hair loss.
By reducing circulating DHT levels by approximately 60 to 70 percent, finasteride addresses the root cause of androgenetic alopecia rather than just the symptom. It does not grow hair in follicles that have been completely dormant for years, but for follicles that are miniaturizing or producing thin hairs, finasteride can slow, stop, or in many cases reverse that process.
Finasteride was originally FDA-approved in 1992 at 5mg for benign prostatic hyperplasia (BPH). The 1mg formulation was subsequently FDA-approved specifically for male pattern hair loss and is sold under the brand name Propecia. Generic finasteride 1mg has been available for many years and is clinically identical to Propecia at a fraction of the cost.
What is finasteride
Finasteride is a 5-alpha reductase inhibitor that blocks the enzyme responsible for converting testosterone into DHT, the primary hormonal driver of male pattern hair loss. Originally FDA-approved in 1992 at 5mg for BPH, the 1mg formulation has been FDA-approved specifically for male pattern hair loss as Propecia.
clinical evidence
Finasteride has one of the strongest evidence bases of any hair loss medication. In a landmark 2-year clinical trial, 83 percent of men who took finasteride experienced no further hair loss, compared to 28 percent in the placebo group, and 66 percent of men on finasteride had measurable hair regrowth. A 5-year follow-up study found a 93 percent reduction relative to placebo in the likelihood of further hair loss progression. Results require consistent daily use. Finasteride is not a one-time treatment, it works by continuously suppressing DHT. If finasteride is discontinued, DHT levels return to baseline and any hair preserved or regrown during treatment is typically lost within 6 to 12 months. Most men begin to see stabilization of hair loss within 3 to 6 months. Visible regrowth, when it occurs, typically becomes noticeable around 12 months of consistent use. Maximum results are generally seen at 2 years.
the details
Finasteride for hair loss is dosed at 1mg once daily, taken at the same time each day, with or without food. Daily consistency is essential. Missing occasional doses has minimal impact, but chronic inconsistency reduces effectiveness. Finasteride is a long-term medication and should be taken continuously to maintain results. Most providers recommend giving it at least 12 months before evaluating its full effect.
Critical Safety Warning
Women who are pregnant or may become pregnant must not handle crushed or broken finasteride tablets. Finasteride can cause birth defects in male fetuses. Your Eros MD provider screens for this and other safety considerations during your assessment.
1mg once daily, taken at the same time each day, with or without food.
Months 1 to 3: possible initial shedding as the hair cycle resets (normal and temporary). Months 3 to 6: shedding slows. Months 6 to 12: stabilization, early regrowth may begin. 12+ months: maximum results.
Results require ongoing daily use. Stopping leads to return of baseline hair loss progression over 6 to 12 months.
the honest picture
Sexual Side Effects
Sexual side effects are the most discussed concern with finasteride and they deserve a direct, honest answer. Clinical trials report sexual side effects (reduced libido, erectile dysfunction, decreased ejaculatory volume) in approximately 1 to 4 percent of men. The majority of men, more than 95 percent in clinical data, do not experience significant sexual side effects.
In most cases where sexual side effects do occur, they are reversible upon discontinuing finasteride.
Post-Finasteride Syndrome (PFS)
Post-Finasteride Syndrome, where sexual or cognitive side effects persist after stopping the medication, is reported but appears to affect a small subset of users. The medical literature on PFS continues to evolve. It is a legitimate concern that patients should discuss with their provider.
Other Considerations
Finasteride decreases PSA levels, which can affect prostate cancer screening interpretation. Always inform your doctor if you are taking finasteride before a PSA test.
A small increased risk of high-grade prostate cancer has been noted in some studies, though the clinical significance of this finding remains debated.
Pregnancy warning: women who are pregnant or may become pregnant must not handle crushed or broken finasteride tablets. Finasteride can cause birth defects in male fetuses.
Eros MD Approach
Your Eros MD provider discusses your personal risk profile, health history, and any concerns before prescribing. If you experience any side effects, your provider can adjust or discontinue your plan.
medication comparison
Finasteride
Minoxidil
Mechanism
Form
FDA Approved
Target
Best For
Used Together
Blocks DHT production (hormonal root cause)
Oral tablet (1mg daily)
Yes, 1mg for male pattern hair loss
Addresses the cause of androgenetic alopecia
Men with DHT-driven androgenetic alopecia
Yes, more effective than either alone
Increases blood flow to follicles, extends growth phase
Topical solution or foam, or oral low-dose pill
Yes for topical 5%; oral is off-label for hair loss
Stimulates follicle activity regardless of cause
Men wanting to stimulate growth in addition to stopping loss
Yes, standard of care for most men with significant hair loss
How it works
Physician-led evaluation, straightforward prescription, ongoing monitoring.
Complete your confidential hair loss assessment, covering your hair loss pattern, health history, any current medications, and goals. Takes about 5 to 10 minutes.
A licensed Eros MD physician reviews your intake, screens for contraindications (including any relevant medications and the pregnancy safety considerations), and determines if finasteride is appropriate.
If prescribed, your finasteride 1mg is dispensed from a licensed pharmacy with clear usage instructions.
Delivered in discreet, unmarked packaging. Nothing on the outside identifies the contents.
Ongoing provider support is included. Your provider can answer questions, address any side effect concerns, and adjust your plan as needed.
Questions worth asking
Yes. Finasteride 1mg is the active ingredient in Propecia. Generic finasteride contains the same active ingredient at the same dose, manufactured to the same FDA bioequivalence standards. Generic finasteride is clinically identical to Propecia at a significantly lower cost.
Yes. Clinical trials show finasteride stopped further hair loss in 83 percent of men who took it for two years (compared to 28 percent for placebo). 66 percent experienced measurable hair regrowth. Results require consistent daily use and are maintained only while taking the medication.
Most men see stabilization of hair loss within 3 to 6 months. Visible regrowth, when it occurs, typically becomes noticeable around 12 months. Maximum results are generally reached at the 2-year mark with consistent daily use.
Sexual side effects, including reduced libido and changes in erectile function, are reported in approximately 1 to 4 percent of men in clinical trials. The large majority of men taking finasteride do not experience significant sexual side effects. When they do occur, they are typically reversible upon discontinuation. Your Eros MD provider discusses your personal risk profile before prescribing.
Finasteride is not FDA-approved for women with hair loss, though it is sometimes prescribed off-label by physicians in specific cases (typically postmenopausal women). Women who are pregnant or may become pregnant must not take or handle crushed finasteride. It can cause birth defects in male fetuses.
If finasteride is discontinued, DHT levels return to baseline over several months. Any hair preserved or regrown during treatment is typically lost within 6 to 12 months of stopping. Finasteride must be taken continuously to maintain results.