Finasteride vs minoxidil: differences, results and choosing treatment
Medical comparison between finasteride and minoxidil for androgenetic alopecia: mechanism, use, times, limits and safety.
The essentials in less than a minute
- They are not equivalent medications: they act differently and can be used alone or within a combination plan.
- Oral finasteride 1 mg is authorised for certain phases of androgenetic alopecia in men; Topical minoxidil has its own presentations and indications.
- Both require consistency for months and their benefits diminish when they are abandoned.
- The choice depends on the diagnosis, sex, age, history, preferences and tolerance.
Two treatments with different objectives
Finasteride reduces the conversion of testosterone to dihydrotestosterone by inhibiting 5-alpha-reductase. Its main objective is to stop the miniaturization of the follicle in male androgenetic alopecia. Minoxidil is commonly applied to the scalp and promotes growth in some patients, although its mechanism is not completely understood.
None treats all causes of falls. A loss in plaques, with inflammation, scarring, recent illness or rapid weight loss requires evaluating another diagnosis before choosing.
Practical comparison
| Appearance | Oral finasteride 1 mg | Topical minoxidil |
|---|---|---|
| Typical use | Initial phases of androgenetic alopecia in certain men. | Alopecia according to the presentation and Summary of Product Characteristics (SmPC) provided. |
| Application | Daily tablet under prescription. | Regular application on dry scalp. |
| First balance | Usually after 3–6 months. | It may require 4 months or more. |
| Safety considerations | Sexual function, mood, pregnancy and manipulation. | Irritation, unwanted hair growth, dizziness or rare cardiovascular symptoms. |
Can they be combined?
In some dermatological plans they are combined because they act through different routes. That doesn’t mean that every person needs both or that the combination is automatically superior. Tolerance, cost, daily routine and the ability to maintain it matter as much as the photographic response.
The dose should not be increased or switched from one route to another based only on internet results. The formulation, concentration and authorised population change between products.
The right question
It is not “which is stronger?”, but “what diagnosis do I have, what option can I maintain, and what personal risks need to be reviewed?”
How to decide and measure
Before prescribing, the pattern, evolution, family history, medication, mental health, possibility of pregnancy and scalp symptoms are reviewed. Comparable photographs at the beginning and at 3, 6 and 12 months help avoid conclusions due to changes in lighting or hairstyle.
If the loss progresses despite a correctly maintained regimen, it is advisable to review diagnosis, adherence and associated causes before adding treatments.
Medically reviewed by Dr Paulo
Medical information reviewed for clinical coherence, safety and source quality.
Ordem dos Médicos Portugal 69376Official and clinical sources
- AEMPS · Finasteride 1 mg: Summary of Product Characteristics (SmPC)
- AEMPS · Topical minoxidil: Summary of Product Characteristics (SmPC)
- EMA Safety measures for finasteride and dutasteride
Regulatory information may change. Always check the Summary of Product Characteristics (SmPC) and the leaflet of the dispensed presentation.
Do you need a medical evaluation?
We review pattern, evolution, history and treatments to decide if online management is appropriate or if you need in-person dermatology.
See medical consultation