Hair loss

Propecia vs finasteride: what’s the difference?

Propecia and finasteride are the same hair loss medicine. But are there any differences you should know?

iconPublished 4th December 2025

What’s better for hair loss, Propecia or finasteride? They're actually the same medication. Finasteride is the active ingredient, while Propecia is the brand name.

So, is there any difference between these two products at all? Read on to find out.

Propecia vs finasteride: Key differences

Let’s take a look at finasteride and Propecia head-to-head.

Features
Type of medication
Active ingredient
How it’s used
How it works
How to take it
Cost
Hair loss results
Availability
Finasteride
Generic
Finasteride
Hair loss in men, enlarged prostate
Lowers DHT levels to prevent hair loss and encourage regrowth
Daily pill
Usually cheaper
Effective in 80.5% of people
Private prescription
Propecia
Branded
Finasteride
Hair loss in men
Daily pill
Usually more expensive
Effective in 80.5% of people
Private prescription

FYI: When a drug is sold without a brand name, it’s called a generic medicine.

The main thing that sets Propecia and finasteride apart is price. Brand-name medicines typically cost 30-60% more than generic ones. Also, finasteride is licensed as a treatment for an enlarged prostate as well as hair loss.

How do results differ?

They don’t. Propecia and finasteride are the same drug. That means scientific research looking into finasteride hair loss would apply to Propecia, too.

So, how long does finasteride take to work? Most people start noticing changes within 3-6 months. But it can take up to a year for results to peak.

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Side effects: finasteride vs Propecia

Since Propecia and finasteride are the same medication, they have identical side effects.

Possible side effects include:

  • Trouble having an erection
  • Low libido
  • Problems with ejaculation
  • Breast tissue growth (gynaecomastia)
  • Low mood or depressive symptoms

Not everyone experiences these side effects. If you do, let your provider know. Your dose can be adjusted or you can switch to an alternative formulation or treatment. When side effects do occur, they typically improve over time, and for most people, they resolve after stopping or switching treatment.

Why is Propecia more expensive?

When a pharmaceutical company develops a new drug, they hold an exclusive patent for a set period. This allows them to recoup research and development costs by pricing the branded medication higher.

Once the patent expires, other companies can produce generic versions. These generics contain the same active ingredient and work identically, but cost less because the manufacturers don't need to cover the original research costs.

This is why generic finasteride costs less than branded Propecia, despite being the same medication.

When might a clinician recommend the branded product?

In the UK, generic finasteride is the standard route. It contains the same active ingredient as Propecia and works identically, but costs significantly less.

However, generic and branded medications can contain different inactive ingredients (such as fillers or coatings). In rare cases, if someone has an allergy to an inactive ingredient in the generic version, they may be prescribed Propecia instead.

Personal preference also matters. Some people feel more comfortable starting with the branded version because it's what they've heard of, then switch to generic later. Others choose generic from the start. Both are valid choices.

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How to choose what’s best for you

Both generic finasteride and Propecia work identically. Here's what to consider:

  • Cost. The branded version will be more expensive. At MANUAL, we offer generic finasteride.
  • Personal preference. Some people prefer starting with the branded version for reassurance, though most switch to generic once they're comfortable with treatment.

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FAQ

Propecia vs finasteride: FAQ

DisclaimerAt MANUAL, we ensure that everything you read in the Health Centre is medically reviewed and approved. However, the information provided is not meant to replace professional medical advice, diagnosis, or treatment. It should not be relied upon for specific medical advice.
References
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Duerden, Martin G., and Hughes, Dyfrig A. “Generic and Therapeutic Substitutions in the UK: Are They a Good Thing?” British Journal of Clinical Pharmacologyscribble-underline, vol. 70, issue 3, 2010:335-341. https://bpspubs.onlinelibrary.wiley.com/doi/10.1111/j.1365-2125.2010.03718.x.

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Hu, Ruiming, et al. “Combined Treatment with Oral Finasteride and Topical Minoxidil in Male Androgenetic Alopecia: A Randomized and Comparative Study in Chinese Patients,” Dermatologic Therapyscribble-underline, vol. 28, issue 5, 2015:303-308. https://onlinelibrary.wiley.com/doi/abs/10.1111/dth.12246.

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Olsen, Elise A., et al. “Global Photographic Assessment of Men aged 18 to 60 years with Male Pattern Hair Loss Receiving Finasteride 1mg or Placebo,” Journal of the American Academy of Dermatologyscribble-underline, vol. 67, issue 3, 2012:379-386. https://www.jaad.org/article/S0190-9622(11)01184-4/abstract.

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Straka, Robert J, et al. “Potential Clinical and Economic Impact of Switching Branded Medications to Generics,” American Journal of Therapeuticsscribble-underline, vol. 24, issue 3, 2017:e278-e289. https://journals.lww.com/americantherapeutics/fulltext/2017/05000/potential_clinical_and_economic_impact_of.6.aspx.

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“Finasteride 1mg Film-coated Tablets,” Electronic Medicines Compendium, scribble-underline2025 https://www.medicines.org.uk/emc/files/pil.7068.pdf. Accessed 26 Nov. 2025.

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“Prescribing by Generic or Brand Name in Primary Care,” Specialist Pharmacy Service, NHSscribble-underline, 2022, https://www.sps.nhs.uk/articles/prescribing-by-generic-or-brand-name-in-primary-care/ Accessed 26 Nov. 2025.

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“Propecia (finasteride) - tablets 1mg,” Food and Drug Administration,scribble-underline 2010 https://www.accessdata.fda.gov/drugsatfda_docs/label/2011/020788s018lbl.pdf. Accessed 26 Nov. 2025.

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