Oral Medication and Hair Transplantation: Does It Make Sense to Have Surgery Without Treatment?

Before addressing the relationship between oral medication and hair transplantation, it is worth briefly reviewing androgenetic alopecia and its treatment.

Table of Contents

• 1. What is androgenetic alopecia?
• 2. Antiandrogens: finasteride and dutasteride
• 3. Minoxidil: how it works
• 4. Safety and possible side effects
• 5. Regulation (FDA and EMA)
• 6. Combined treatment
• 7. Does a transplant without medication make sense?
• 8. What medication do we use before and after the transplant?
• 9. Can oral medication be replaced?
• 10. Scientific evidence
• 11. Frequently asked questions

1.What Is Androgenetic Alopecia?

Androgenetic alopecia is the most common cause of hair loss in both men and women. It does not appear suddenly, but follows a progressive course. In individuals with a genetic predisposition, hair follicles respond to dihydrotestosterone (DHT) and gradually become smaller. This is what we know as miniaturisation.

This is something we see daily in our consultations, both in Madrid and Mexico City: patients who interpret areas of fine hair as “lost”, when in reality there is still miniaturised hair that can improve with medical treatment.

Hair loses thickness, density, and duration in its growth phase. In more advanced stages, the follicle may stop producing visible hair.

It is therefore important to understand that treatment does not aim to create new hair, but to slow the process and preserve the hair that can still be recovered.

2.Antiandrogens: Finasteride and Dutasteride

Within the treatment of androgenetic alopecia, antiandrogens form the cornerstone. They act on the enzyme 5-alpha reductase, reducing the conversion of testosterone into DHT.

• Finasteride acts primarily on type II
• Dutasteride acts on both type I and type II

This has clinical implications depending on the pattern of alopecia. Their main effects are:

• slowing progression
• stabilising miniaturisation
• preserving existing hair

They do not generate new hair in completely bald areas, but they do significantly alter the course of alopecia.

3.Minoxidil: How It Works

Minoxidil acts directly on the hair follicle.

• improves vascularisation
• prolongs the growth phase
• increases follicle size
• improves hair calibre
• stimulates still-active follicles

It has also been linked to the Wnt/β-catenin pathway, which is involved in the follicular cycle.

In practice, it helps improve hair quality and the environment in which it grows.

4.Safety and Possible Side Effects

This is one of the points that concerns patients most.

Antiandrogens may be associated with side effects, primarily in the sexual sphere. These are not common, but they should be explained and assessed on a case-by-case basis.

In the case of oral minoxidil, the most common effects may include:

• Increased body hair (hypertrichosis).
• Fluid retention.
• Palpitations.
• Changes in blood pressure.

In practice, when treatment is correctly indicated, the majority of patients tolerate it well. If a side effect does occur, it can usually be managed by adjusting the dose.

5.Regulation (FDA and EMA) for Treating Alopecia

• Topical minoxidil and finasteride are approved for androgenetic alopecia.
• Oral minoxidil and dutasteride are used off-label.

When we talk about regulation, we are referring to official bodies that evaluate the safety and efficacy of medications: the FDA (Food and Drug Administration) is the regulatory agency in the United States, and the EMA (European Medicines Agency) is the regulatory body in the European Union.

Off-label use is common when there is sufficient scientific evidence and clinical experience to support it.

6.Combined Treatment

In clinical practice, the best approach to treating androgenetic alopecia is usually a combined one. Antiandrogens address the hormonal cause, while minoxidil acts directly on the follicle. This combination makes it possible to:

• Stabilise alopecia.
• Preserve native hair.
• Improve hair quality.
• Better prepare the patient if a hair transplant is being considered.

This reinforces the importance of integrating medical treatment as part of the standard management of patients undergoing a hair transplant.

7.Does a Transplant Without Medication Make Sense?

This is one of the most frequent questions we receive. Many patients come to us with a high degree of miniaturisation believing that surgery is the only solution. However, this is not always the case.

A hair transplant can technically be performed without medication, but in many cases it is not the most advisable course of action.

If alopecia is left untreated:

• It continues to progress.
• Native hair is lost.
• The result may look less natural over time.

Rather than a simple yes or no, it is a matter of planning each case carefully.

8.What Medication Do We Use Before and After the Transplant?

Oral medication and hair transplantation are part of the same therapeutic approach. Medical treatment not only slows alopecia, but also:

• Prepares the follicle for surgical stress.
• Improves graft survival.
• Optimises the growth environment.
• Helps maintain long-term results.

The combination typically used includes:

• An antiandrogen (finasteride or dutasteride).
• Minoxidil.

The antiandrogen slows progression, while minoxidil improves hair quality.

Without this foundation, follicles may be more vulnerable and results less stable over time.

9.Can Oral Medication Be Replaced?

Many patients ask whether oral medication can be replaced by topical or intradermal treatments. Currently, the answer is not entirely. Treatments such as hair mesotherapy can be useful as a complement, but they do not replace the effect of systemic treatment.

It is worth noting that these treatments require greater consistency, tend to have lower adherence, and must be paused in the period surrounding the transplant, which reduces their efficacy. For this reason, at the Instituto Médico del Prado we recommend them as a supporting measure within a comprehensive androgenetic alopecia treatment plan.

10.Scientific Evidence

The medical treatment of androgenetic alopecia is supported by a solid scientific foundation, backed by numerous studies, reviews, and meta-analyses.

In the context of hair transplantation, there is data reinforcing the importance of oral medication as part of the treatment plan.

A recent comparative study* evaluated 60 patients diagnosed with grade III–V androgenetic alopecia who underwent hair transplantation. Half of the group received finasteride 1 mg daily for 12 months, while the other half received no treatment.

The results showed relevant differences between the two groups. Patients treated with finasteride showed:

• Greater follicular survival.
• Higher final hair density.
• Better overall aesthetic outcome.
• Lower incidence of postoperative shock loss.

Shock loss is a temporary hair shedding that can occur after surgery, when follicles enter a stress phase. In patients without medical treatment, follicles are more vulnerable and this shedding may be more pronounced during the first months.

These findings support the idea that medication not only influences the progression of alopecia, but also affects the quality and stability of results following a hair transplant.

*Reference:
Kishen A, S John R, Krishnan M, Kumar S. Post Operative Finasteride Following Hair Transplant Compared with no Medication: A Prospective Comparative Study. Journal of Chemical Health Risks. 2025.

11.Frequently Asked Questions

Can a hair transplant be performed without medication?

Yes, it is possible. But in many cases it is not the most advisable approach.

If alopecia is left untreated, native hair may continue to be lost over time and the result may become less stable.

Which is more important — oral medication or the hair transplant?

They are complementary. The transplant redistributes hair and the medication helps maintain the result. Using only one of the two tends to limit the outcome.

When should medication be started?

It is usually started before the transplant, following a medical assessment.

Is oral medication a lifelong commitment?

In most cases, yes — it should be maintained long term.

Does medication improve the results of a hair transplant?

Yes. It improves hair quality and helps make the result more stable over time.

Final Note

A hair transplant redistributes hair.
Medication stabilises alopecia.

When both are combined:

• Results are optimised.
• Native hair is preserved.
• Greater long-term stability is achieved.

This content has been prepared by the medical team at the Instituto Médico del Prado and reviewed by Dr. Bonilla Juárez and Dr. Muñoz Ramírez.

If you are considering starting treatment for hair loss or would like to know which options are most suitable for your situation, we can help you analyse your case individually and determine the most appropriate course of action.

We see patients in both Madrid and Mexico City, tailoring each treatment to the specific characteristics of each case.

Dr. Espinosa Custodio works at the Instituto Médico del Prado, his hair clinic in Madrid and in Mexico City. To book an appointment, you can contact us by phone at 912 468 664, via WhatsApp at 627 396 322, or through the contact page on our website. If you are calling from Mexico, our number is +52 55 4590 9909.

References

1. Kishen A, S John R, Krishnan M, Kumar S. Post Operative Finasteride Following Hair Transplant Compared with no Medication: A Prospective Comparative Study. Journal of Chemical Health Risks. 2025.
2. Olsen EA, Whiting D, Bergfeld W, et al. A randomized clinical trial of finasteride 1 mg in men with androgenetic alopecia. Journal of the American Academy of Dermatology. 2002;47(3):377–385.
3. Kaufman KD, Olsen EA, Whiting D, et al. Finasteride in the treatment of men with androgenetic alopecia. Journal of the American Academy of Dermatology. 1998;39(4):578–589.
4. Rossi A, Cantisani C, Melis L, et al. Minoxidil use in dermatology, side effects and recent patents. Recent Patents on Inflammation & Allergy Drug Discovery. 2012;6(2):130–136.
5. Gupta AK, Charrette A. The efficacy and safety of 5-alpha reductase inhibitors in androgenetic alopecia: a systematic review and meta-analysis. Journal of Dermatological Treatment. 2014;25(2):156–161.
6. Gupta AK, Talukder M. Efficacy and safety of low-dose oral minoxidil for androgenetic alopecia: a systematic review. Journal of the American Academy of Dermatology. 2021;84(3):737–746.
7. Ramos PM, Sinclair RD. Management of androgenetic alopecia: a review. Dermatologic Clinics. 2015;33(1):1–12.