RecruitingPhase 2NCT07335367

PRP Combined With Botulinum Toxin Type A Injection for the Treatment of Androgenetic Alopecia: A Study

Sponsor

Nanfang Hospital, Southern Medical University

Enrollment

76 participants

Start Date

Jan 9, 2026

Study Type

INTERVENTIONAL

Conditions

Androgenetic alopecia (AGA)

Summary

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.

Eligibility

Min Age: 18 YearsMax Age: 60 Years

Inclusion Criteria6

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.
Patients provide informed consent and voluntarily participate in the study.
A signed informed consent form is obtained.
Age between 18 and 60 years, in good general health.
No use of any medications for AGA treatment within the past 6 months.
Absence of alopecia areata, local infection, or neuromuscular diseases.

Exclusion Criteria7

Disease duration exceeding 5 years.
Patients who do not meet the diagnostic criteria for AGA.
Individuals with coagulation disorders.
Patients with active skin diseases or other severe systemic illnesses.
Patients with blood-borne infectious diseases such as Hepatitis A, Hepatitis B, HIV/AIDS, or Syphilis.
Use of any medications for hair loss treatment within the past 6 months.
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.

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Interventions

COMBINATION_PRODUCTInjection of PRP combined with Botulinum Toxin Type A into the alopecic area(s)

Treatment Protocol: Subjects in the PRP combined with Botulinum Toxin Type A (BTX-A) treatment group received injections using the same method and frequency as the PRP control group. For the first session, the injection consisted of 100 units of BTX-A reconstituted in 4 ml of PRP. The second and third sessions were identical to those administered to the control group (PRP injection only). Follow-up Assessments: A safety evaluation was conducted for each subject 14 days after the initial treatment, during which the investigator provided scalp care guidance. Subsequent evaluations for both safety and efficacy were performed at 1, 2, 3, and 6 months following the initial treatment.

OTHERPRP-only injection into the alopecic area

Treatment Protocol for the PRP-Only Control Group: Subjects in the PRP-only control group will receive PRP injection therapy alone. The PRP will be administered intradermally at a depth of approximately 1.5-2.5 mm, with injection points spaced 1 cm apart, into the predefined scalp area (≥12 cm from the lateral canthus and ≥9 cm from the top of the ear, encompassing the frontal, temporal, parietal, and occipital regions). The injections will be administered at a dose of 0.1 ml/cm². The treatment regimen consists of monthly sessions, with 4 ml of PRP injected per session, for a total of 3 consecutive sessions. Follow-up Assessments: A safety evaluation will be conducted for each subject 14 days after the initial treatment, during which the investigator will provide personalized scalp care guidance. Subsequent comprehensive assessments evaluating both safety and efficacy will be performed at 1, 2, 3, and 6 months following the initial treatment.