Comparing Sarecycline and Doxycycline Effects on the Skin and Gut Bacteria in Acne.
Recruiting now · Phase 4
Conditions studied: Acne Vulgaris
In brief
This study is being done to help better understand how the gut and skin bacteria of the body change when people with acne are treated with Sarecycline or Doxycycline. The bacteria in the gut and on the skin will be studied to see how each treatment may affect them and whether they change the profile of the bacteria that is present.
Key facts
- Study ID
- NCT07544251
- Run by
- Integrative Skin Science and Research
- People needed
- 30
- Starts
- 2026-04-20
- Expected to finish
- 2027-06-01
- Last updated by the study team
- 2026-04-22
Who can join
Age: 9 and older. Sex: any. Healthy volunteers: accepted.
You may qualify if…
- Diagnosis of acne vulgaris with:
- At least 10 inflammatory lesions (papules, pustules, and nodules) up to 100 noninflammatory lesions (open and closed comedones)
- No more than 2 nodules on the face
You may not qualify if…
- Dermatological condition of face or facial hair that could interfere with clinical evaluations
- Subjects who have used the following medications (topical refers only to the facial area) will not be eligible:
- 2a) Within 2 week prior to randomization:
- Topical acne medications such as retinoids, antibiotics, hormonal modulators
- Topical benzoyl peroxide
- Topical anti-inflammatories and corticosteroids
- 2b) Within 4 weeks prior to randomization:
- Systemic antibiotics
- Systemic acne treatments
- Oral probiotic supplement
- Systemic corticosteroids
- 2c) Within 12 weeks prior to randomization:
- Systemic retinoids
- Individuals who have changed any of their hormonal based contraception or therapies within 3 months prior to joining the study.
- Individuals who are pregnant or breastfeeding.
- Individuals on oral contraceptive pills or progesterone or estrogen containing therapies unless they have been on a stable dose for 2 months.
- Individuals on finasteride or dutasteride
- Current tobacco smoker or a tobacco smoking history that is greater than 5 pack-years.
Where it is running
- Integrative Research Institute — Sacramento, California, United States (enrolling)
Full record on ClinicalTrials.gov
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