You may have been taking finasteride for some time now and got to the point where you are wondering when noticeable hair regrowth will appear. Finasteride is widely regarded as one of the most effective treatments for male pattern hair loss, with only dutasteride showing greater efficacy [1]. Research suggests that around 83% of men experiencing thinning at the crown are able to halt further hair loss with finasteride [2].
That said, finasteride does not always work the way people expect or hope. There are several reasons why it may fall short, so if you are worried about ongoing hair loss, it is important to identify what might be affecting finasteride’s performance in your case. In this guide, you will discover:
- Why finasteride may not be working as expected
- How finasteride works
- What steps you can take to improve finasteride’s effectiveness
How does finasteride work?
To understand how finasteride works, it helps to look at the class of medication it belongs to: 5-alpha-reductase inhibitors. The enzyme 5-alpha-reductase occurs naturally in the body and is responsible for converting testosterone into dihydrotestosterone (DHT).
DHT is a male sex hormone that plays a key role in male pattern hair loss, as well as in a range of other bodily processes, particularly those linked to male development, such as the growth of facial and body hair [3]. It binds to androgen receptors in the scalp’s hair follicles, causing them to shrink over time. As this happens, the hair growth cycle becomes shorter, regrowth slows, and in some cases, hair production may stop entirely.
Why isn’t finasteride working?
To answer why finasteride isn’t working, we consider some key factors:
- How long you’ve been using finasteride
- What stage of hair loss you’re at
- What type of hair loss you are using finasteride for
- How frequently you are using finasteride
You haven’t been using finasteride long enough
Firstly, we need to consider how long you’ve been taking finasteride for. Increased shedding is a common side effect during the first few months, as your hair growth cycle adjusts to the medication.
Most people need to use finasteride for at least three months before noticing any changes. For some, this timeline can extend to six months or more, depending on how their hair growth cycle responds to the treatment.
Although this shedding from finasteride can make it seem as though the treatment is not working, it is a normal part of the process. If you have only recently started treatment, it is worth continuing for a few more months to see whether it settles on its own.
However, if you have been using finasteride for more than six months and are not seeing improvements in your hair loss, there may be other factors at play.
Your hair loss is too advanced
Finasteride tends to be most effective when introduced in the earlier stages of male pattern baldness, when the hair follicles are still active and capable of producing healthy strands. At this point, the medication can help slow or halt the progression of thinning and, in some cases, support partial regrowth.
However, if your hair loss has progressed to a more advanced stage, the follicles may have become significantly miniaturised or inactive. In these later stages, finasteride is less likely to produce noticeable improvements, as it cannot revive follicles that have already stopped functioning altogether. Its primary role is to preserve existing hair rather than restore areas where loss is already extensive.
You’re using finasteride for the wrong type of hair loss
Finasteride is only effective for male pattern baldness, and in some limited cases, female pattern hair loss. If your hair loss is caused by conditions such as alopecia areata, telogen effluvium, or another form of alopecia, you are unlikely to respond to finasteride treatment.
Male pattern baldness follows a distinct and predictable pattern, which is why tools such as the Norwood Scale are often used to assess and diagnose it. This scale outlines the typical stages of hair loss, usually beginning with a receding hairline at the temples and progressing to thinning at the crown.
If your hair loss does not match these patterns, it may indicate a different underlying cause. For example, patchy hair loss, sudden diffuse shedding, or hair loss linked to stress, illness, or hormonal changes may point to other types of alopecia that require a different treatment approach.
You need to take finasteride more often
Taking less finasteride than prescribed can reduce its effectiveness. Most men are advised to take 1 mg daily to maintain consistent levels in the body. If you are using a topical form of finasteride, it is important to apply it exactly as directed on the product label to ensure optimal results.
Finasteride’s impact has plateaued
Most finasteride users see the most significant improvements in hair growth within the first year of treatment [4]. The graph below highlights the modified global photographic assessment scores for men at different Norwood stages who used finasteride over a 10-year period.
![Graph showing changes in modified global photographic assessment scores (MGPA) from before treatment through year 10 of treatment on each Norwood-Hamilton scale (N-H) group at first visit [4].](https://drhair.co.uk/wp-content/uploads/2026/07/Graph-showing-changes-in-modified-global-photographic-assessment-scores-MGPA-from-before-treatment-through-year-10-of-treatment-on-each-Norwood-Hamilton-scale-N-H-group-at-first-visit-4.png)
In many cases, improvements can continue for up to six years, depending on the stage of hair loss. However, these results do not increase indefinitely. Over time, the effects of finasteride may begin to level off, and progress can plateau. As a result, long-term users may feel that the treatment is no longer as effective as it once was (although it’s important to note that stopping finasteride normally results in continued hair shedding — you’ll start to lose the hair finasteride has maintained over the years).
What to do if finasteride isn’t working?
If finasteride isn’t working, the most important thing is to understand what success with finasteride actually looks like. In most cases, the primary benefit is slowing or stopping further hair loss, rather than achieving significant regrowth. While finasteride was shown to halt hair loss in 83% of men with crown thinning, regrowth occurred in 61% [2]. For frontal hair loss, around 70% experienced a slowdown in thinning, but only 37% saw regrowth. Setting realistic expectations from the outset can help avoid unnecessary frustration.
What to do if finasteride isn’t working (with timeframes)
If finasteride does not appear to be working, the right next step depends on how long you have been taking it. Here is a general guide to timeframes and what to consider at each stage:
Timeframe | What to expect | What to do |
Six months | Some individuals simply need more time. Side effects, if present, may also still be settling. | Consider introducing a complementary treatment such as minoxidil to enhance overall effectiveness. |
Nine months | Most users will have seen some level of improvement by this point, even if subtle. | If you have noticed no changes at all, speak to a hair loss specialist for a closer assessment. |
Twelve months | Finasteride has typically shown its full effect after one year of consistent use. | If you are still seeing no results, it may not be the right treatment for you. A specialist can help explore alternative options. |
Take your hair loss treatment assessment now
Finasteride can be highly effective, but it does not work the same way for everyone. Factors such as the stage of hair loss, the type of alopecia, dosage consistency, and how long you have been using the treatment all play a role in the results you see. In many cases, the goal is to slow or stabilise hair loss rather than achieve dramatic regrowth, so setting realistic expectations is key.
If you are unsure whether finasteride is working for you, a tailored assessment can identify the underlying cause of your hair loss and guide you towards the most effective treatment plan for your situation.
FAQs
No, finasteride does not stop balding in 100% of cases. While it is effective for many men, results vary, and some may only experience a slowdown rather than a complete halt.
You may still be losing hair because finasteride does not work equally for everyone, or because factors like advanced hair loss, incorrect diagnosis, or inconsistent use are affecting results.
You can improve results by taking finasteride consistently, using it for long enough, and combining it with complementary treatments such as minoxidil or lifestyle changes.
