Even when someone wants to begin hair loss treatment, taking medication every day can feel burdensome, or a person may hesitate because of side effects experienced during past use. However, leaving male pattern hair loss untreated may cause hair to gradually thin and the affected area to widen, so it is important to explore available treatment options together with a medical professional.
One option that can be considered in such cases is the dutasteride injection (dutasteride mesotherapy). In this article, we will explain, in order, how dutasteride injections work, how they differ from oral medication, what changes can be expected, who they may be suitable for, and what to be cautious about.
What is a dutasteride injection?
In male pattern hair loss, the male hormone testosterone is converted into dihydrotestosterone (DHT) by 5-alpha reductase, and hair follicles sensitive to DHT gradually become thinner as the condition progresses. Dutasteride is an ingredient that inhibits 5-alpha reductase, thereby reducing the production of DHT.
While oral dutasteride delivers the drug systemically, a dutasteride injection is a localized treatment in which a low-concentration preparation of the drug is injected directly into the dermal layer of the scalp where hair loss has progressed. At Modi Hair Plant, after checking the condition of the scalp and hair loss, dutasteride diluted to 0.05% is injected using a fine needle.
Localized injection aims to deliver the drug to the area where it is needed while reducing the total dose and systemic exposure. However, being an injection does not mean that the drug is not absorbed systemically at all, or that the possibility of side effects is completely eliminated. In addition, accumulated research and long-term data are more limited than for oral treatment, so the decision should be made after receiving a full explanation of the advantages and disadvantages of the treatment.
How does it differ from oral dutasteride?
- Method of administration: Oral medication is taken regularly at a set dose, whereas the injection is administered directly into the scalp at a medical institution.
- Treatment interval: Oral medication is generally taken daily. Injections are performed at intervals of several weeks, depending on the scalp condition and treatment stage.
- Systemic exposure: Localized injection aims to reduce systemic exposure, but systemic absorption cannot be completely ruled out.
- Convenience and burden: Oral medication is simple and its cost burden is relatively low. Injections require regular visits to the clinic, and pain during the procedure or cost burden may occur.
Therefore, it is difficult to say that dutasteride injections are superior to oral medication in every respect. If treatment can be maintained stably with oral medication, oral treatment may be considered first, while injections may be an alternative when taking medication is difficult or when the response to existing treatment has not been sufficient.
What effects can be expected?
The main purpose of dutasteride injections is to reduce the influence of DHT in order to slow the progression of male pattern hair loss and limit further weakening of hair that has become thinner. In some patients, changes in hair thickness or density may be expected, but the treatment response varies depending on the duration and degree of hair loss, the condition of the hair follicles, age, and concurrent treatments.
Because the hair growth cycle is long, it is difficult to judge the results from only one or two treatments. Generally, treatment is performed at regular intervals in the early stage, and the response is assessed over approximately 3 to 6 months by comparing the amount of shedding, hair thickness and density, and clinical photographs. At Modi Hair Plant, depending on the patient's condition, a method may be used in which treatment is performed at 2-week intervals for approximately the first 3 months and then adjusted to monthly intervals. The actual number of sessions and intervals vary according to the results of the consultation.
Who may consider dutasteride injections
- Those diagnosed with male pattern hair loss who find it difficult to continue taking oral medication
- Those in whom hair loss progression is still observed even after taking finasteride
- Those concerned about the systemic side effects of oral hair loss medication
- Those who prefer regular in-clinic treatment instead of taking medication daily
- Those who can accept the burden of injection pain and repeated clinic visits
On the other hand, alopecia areata, telogen effluvium, and scarring alopecia have different causes and treatments. Rather than choosing dutasteride injections simply because hair is falling out, the type of hair loss should first be accurately identified.
Precautions and possible side effects
Temporary pain, redness, swelling, bruising, itching, or tenderness may appear at the injection site. In rare cases, inflammation, infection, or unexpected local reactions may occur. If pain or swelling after the procedure worsens or persists for a long time, you should inform the medical institution.
If the dutasteride ingredient is absorbed systemically, the possibility of adverse reactions known from the oral medication—such as decreased libido, changes related to erection or ejaculation, breast discomfort, and mood changes—cannot be completely ruled out. Existing medical conditions, medications currently being taken, and past side effects from hair loss medication should be disclosed to the medical staff at the time of consultation.
Women who are pregnant or may become pregnant must not be exposed to dutasteride. Women, minors, and those planning a pregnancy must consult separately with a medical professional regarding whether the treatment can be applied and what precautions are required. Dutasteride scalp injections may differ from standard oral treatment in the level of evidence and scope of approval, so it is important to decide whether to proceed after receiving a full explanation and giving consent.
Dutasteride Injection FAQ
1. Can I stop taking oral medication right away once I start dutasteride injections?
Stopping on your own is not recommended. Whether to continue, reduce, or switch to injections should be decided after checking the effects and side effects of the current medication and the progression of hair loss.
2. How often should the injections be received?
In the early stage, treatment is performed at intervals of 2 weeks or several weeks, and once the condition stabilizes, the interval may be adjusted to a month or longer. A fixed number of sessions does not apply equally to all patients.
3. When can the effects be observed?
Considering the hair growth cycle, several months of observation are needed. Scalp photographs taken around 3 to 6 months and the hair condition are usually compared, but depending on the individual, it may take longer or there may be no noticeable change.
4. How painful are the injections?
Even when a fine needle is used, the drug is injected into multiple areas, so a stinging or dull aching sensation may occur. The degree experienced differs depending on pain sensitivity and the area of injection.
5. Can hair loss be treated with dutasteride injections alone?
Depending on the patient, it may be considered as a standalone treatment, but other treatments such as minoxidil or oral medication may need to be combined. In areas where hair follicles have already been lost, sufficient recovery may be difficult with medication alone, so other methods such as hair transplant are reviewed.
Key Summary
- A dutasteride injection is a localized treatment in which the drug is injected directly into the dermal layer of the scalp.
- It can be considered when continuing oral medication is difficult or when the response to existing treatment is not sufficient.
- The aim is to reduce systemic exposure, but the possibility of side effects is not completely eliminated.
- Assessing the effect usually requires several months, and results and treatment intervals vary by individual.
- The type of hair loss and overall health condition should be checked first, and whether to proceed with treatment should be decided together with a medical professional.
If oral medication feels burdensome, start with a diagnosis
Difficulty taking hair loss medication does not mean there are no treatment options. At the same time, dutasteride injections are not a treatment that everyone needs. Modi Hair Plant Clinic checks the type and degree of progression of hair loss, previous treatment experience, and the pattern of side effects, and then determines together with you which method—oral medication or injection—is appropriate.
If you are considering changing the medication you are currently taking or are curious about dutasteride injection treatment, please consult with a medical professional before stopping your medication on your own.
References
- Saceda-Corralo D, Rodrigues-Barata AR, Vañó-Galván S, Jaén-Olasolo P. Mesotherapy with dutasteride in the treatment of androgenetic alopecia. Int J Trichol. 2017;9(3):143–145. doi:10.4103/ijt.ijt_73_16 (PubMed)
- Saceda-Corralo D, Moustafa F, Moreno-Arrones Ó, Jaén-Olasolo P, Vañó-Galván S, Camacho F. Mesotherapy with dutasteride for androgenetic alopecia: a retrospective study in real clinical practice. J Drugs Dermatol. 2022;21(7):742–747. doi:10.36849/JDD.6610 (PubMed)
The literature above consists of clinical materials dealing with mesotherapy, a method of locally injecting dutasteride into the scalp. Dutasteride scalp injections may differ from standard oral treatment in the level of evidence and scope of approval, and treatment responses vary by individual.