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— Hair treatment · Barcelona
Dr. Bermejo Pérez · Reg. no. 63226
Dutasteride injected directly into the scalp for androgenetic alopecia. Greater local effect than oral treatment with lower systemic exposure — the most powerful medical hair treatment currently available.
Not sure which treatment you need? Start with the AI hair diagnosis →
In short
Injected dutasteride acts on the hormone that miniaturises hair in androgenetic alopecia. A 30–45 minute session with no downtime, with effects lasting 6–12 months. Price: €90 per session. Treatment is performed by Dr. Rubén Bermejo Pérez, a registered aesthetic physician (COMB no. 63226), at Clínica Sagrada Família, Barcelona.
Dr. Bermejo explains dutasteride mesotherapy: micro-injections into the scalp with fewer effects than oral medication.
Medical judgement
“Oral dutasteride reaches the whole body. Injected into the scalp, it goes exactly where it needs to — the follicle — at a concentration oral treatment could never safely reach.”Dr. Rubén Bermejo Pérez
How it works · Injected dutasteride
Protecting the follicle, locally.
Hormones gradually miniaturise the follicle.
Dutasteride acts directly in the scalp.
Far less reaches the bloodstream than with oral treatment.
Symbolic illustration.
What it treats
Dutasteride inhibits 5-alpha reductase types 1 and 2 — the enzyme that converts testosterone into DHT, the hormone that destroys the follicle in androgenetic alopecia. Injecting it concentrates the drug in the scalp with less exposure for the rest of the body.
Female pattern hair loss differs from the male pattern — it mainly affects the central area and the parting. Injected dutasteride is a valid option for women who can't or don't want to take oral treatment, with a very favourable safety profile thanks to low systemic absorption.
For patients already taking oral dutasteride or finasteride without enough response, injection adds a much higher local concentration in the affected area. It's also the alternative for anyone who doesn't tolerate the side effects of oral treatment — the local route minimises them significantly.
Injected dutasteride is often combined with hair PRP in the same protocol. While dutasteride blocks the DHT that destroys the follicle, PRP provides the growth factors that reactivate it. It's one of the combinations with the most clinical evidence for androgenetic alopecia today.
The practical side
Everything you need to know before your consultation. No small print.
With maintenance sessions every 3–6 months, the result holds. Consistency is essential in treating androgenetic alopecia.
Including anaesthetic and micro-injections. Initial protocol of one session a month for 3–4 months.
Possible mild tenderness or swelling of the scalp for the first few hours. Normal life straight away.
It depends on the area to treat and the session protocol. It is set at the assessment.
Where it's applied · Injected dutasteride
A map of micro-injections.
Where loss usually starts to show.
Treated when it's part of the pattern.
One session a month for the first three months, then maintenance.
Who it's for
Not sure if it's for you? That is exactly what the consultation is for: I'll tell you honestly what I see.
Comparison
These are the three injected treatments most asked about for androgenetic alopecia. They don't compete: they act on different mechanisms and are often combined.
| Injected dutasteride | Injected minoxidil | Hair PRP | |
|---|---|---|---|
| How it works | Reduces DHT in the scalp, the hormone that miniaturises the follicle | Stimulates the follicle and extends the hair's growth phase | Growth factors from your own blood that stimulate the follicle |
| Best for | Slowing hormonal hair loss | Thickening and activating weakened hair | Improving hair density and quality |
| Initial protocol | 1 session a month for 3–4 months | Depending on assessment; can be combined in the same session | 3–4 sessions every 4–6 weeks |
| Price per session | €90 | €90 | €150 |
| Women | Only without possibility of pregnancy | Yes, with assessment | Yes |
What the studies say
Published studies on dutasteride mesotherapy show improved hair density in androgenetic alopecia, especially as an add-on to other treatments. The studies are small and protocols vary.
Dutasteride is approved for oral use. Injecting it into the scalp is an off-label medical use, which is why it requires a prior assessment and informed consent.
Applied in local micro-doses, exposure for the rest of the body is lower than with the tablet. Even so, it isn't zero: it's contraindicated in pregnancy and in women who could become pregnant.
Results vary from person to person. Before starting, the AI hair diagnosis confirms whether your hair loss is androgenetic and gives a baseline measurement to compare.
Free first visit · no commitment
In the consultation we study your case, talk about what you want and set the goals together. If you don't need treatment, I'll tell you that too.
Frequently asked questions
Straight answers about injected dutasteride. If your question isn't here, write to me.
It isn't about which is better: they act on different things. Dutasteride slows the hormonal action that miniaturises the follicle and minoxidil stimulates hair growth. In active androgenetic alopecia it's common to combine them, even in the same session.
Yes. Injectable dutasteride refers to hair mesotherapy with dutasteride: it's applied as micro-injections into the scalp, at a dose far lower than the oral route, to act directly on the follicle.
The first goal is to slow hair loss; improvement in density is usually assessed from 3–6 months. Results vary with the degree of alopecia and consistency, which is why we compare with photos and measurements from the initial diagnosis.
The guide price is €90 per session. It depends on the area to treat and the session protocol, and is set at the assessment. The first consultation is free. You can see all fees on the prices page.
Usually 6–12 months. With maintenance sessions every 3–6 months, the result holds. Consistency is essential in treating androgenetic alopecia.
At Clínica Sagrada Família, C/ Torras i Pujalt 1 (3rd floor), Barcelona. It is performed personally by Dr. Rubén Bermejo Pérez, registered physician no. 63226.
Oral dutasteride spreads through the whole body — including areas where it isn't needed and may cause side effects. Injected dutasteride goes directly into the scalp, concentrating the drug where it's needed with minimal systemic absorption. The local result is better, with much lower risk of systemic side effects.
Dutasteride inhibits both types of 5-alpha reductase — types 1 and 2 — while finasteride only inhibits type 2. That makes it more powerful at blocking DHT. In direct comparative studies, dutasteride shows greater efficacy in androgenetic alopecia. Injection adds the advantage of local concentration.
Injection significantly reduces the systemic side effects of oral treatment — sexual dysfunction, breast enlargement, mood changes — because systemic absorption is minimal. Possible local effects are mild tenderness or swelling at the injection points, which disappear within hours.
The first thing you notice is less shedding — between the second and third month. Improved density and hair quality show from the fourth or fifth month. The full result is assessed 6–9 months after starting.
Yes — it's the most effective combination available today. Dutasteride blocks the DHT that destroys the follicle and PRP provides the growth factors that reactivate it. They work through completely different mechanisms and reinforce each other. They can be applied in the same session or alternate sessions.
Yes, with conditions. Injected dutasteride is a valid option for women with androgenetic alopecia. Women of childbearing age must use contraception during treatment — even with minimal absorption, dutasteride can affect male fetal development. Post-menopausal women don't have this restriction.
The usual initial protocol is one session a month for 3–4 months, then maintenance sessions every 3–6 months depending on response. Unlike PRP, dutasteride has a more sustained effect between sessions — DHT blocking persists beyond the immediate treatment.
Free consultation
First visit with no commitment. There is always an assessment first; if the treatment is right for you, it can be done the same day.
In Sant Gervasi, next to Ronda del General Mitre. It is not in the area around the Sagrada Família basilica.