Research Purpose

The objective of this study is to determine the safety and efficacy of combined PRP and BTX-A injection therapy for Androgenetic Alopecia (AGA).

Study Content

This clinical trial is a randomized (1:1), multicenter, parallel-group, controlled study. AGA patients aged 18 to 60 years presenting to the participating centers will be recruited. After providing informed consent, eligible patients who meet the inclusion/exclusion criteria will be randomized in a 1:1 ratio, with separate randomization schedules for male and female patients, into either the experimental group (PRP combined with BTX-A injection) or the control group (PRP injection only). A total of 76 patients will be enrolled.

Control Group: Subjects randomized to the control group will receive PRP injection therapy. The PRP will be administered intradermally (at a depth of approximately 1.5-2.5 mm, with injection points 1 cm apart) into the scalp area (defined as ≥12 cm from the lateral canthus and ≥9 cm from the top of the ear, encompassing the frontal, temporal, parietal, and occipital regions) at a dose of 0.1 ml/cm². The treatment regimen consists of monthly injections, 4 ml per session, for a total of 3 consecutive sessions.

Experimental Group: Subjects randomized to the experimental group will receive injections using the same method and frequency as the control group. For the first session, the injection will consist of 100U of BTX-A reconstituted in 4 ml of PRP. The second and third sessions will be identical to those in the control group (PRP injection only).

Follow-up Assessments: For all subjects, a safety evaluation will be conducted 14 days after the first treatment, along with scalp care guidance provided by the investigator. Subsequent safety and efficacy assessments will be performed at 1, 2, 3, and 6 months following the initial treatment.

Inclusion Criteria:

1. Patients who meet the diagnostic criteria for AGA, confirmed by medical history, clinical presentation, and trichoscopy, with a stage of Norwood-Hamilton III to V or Ludwig I to III.
2. Patients provide informed consent and voluntarily participate in the study.
3. A signed informed consent form is obtained.
4. Age between 18 and 60 years, in good general health.
5. No use of any medications for AGA treatment within the past 6 months.
6. Absence of alopecia areata, local infection, or neuromuscular diseases.

Exclusion Criteria:

1. Disease duration exceeding 5 years.
2. Patients who do not meet the diagnostic criteria for AGA.
3. Individuals with coagulation disorders.
4. Patients with active skin diseases or other severe systemic illnesses.
5. Patients with blood-borne infectious diseases such as Hepatitis A, Hepatitis B, HIV/AIDS, or Syphilis.
6. Use of any medications for hair loss treatment within the past 6 months.
7. Other conditions deemed by the investigator as unsuitable for participation, including but not limited to unreliable patients, or those unable to undergo or comprehend the study assessments.