Sarecycline, sold as Seysara, is an oral antibiotic for inflammatory lesions of non-nodular moderate-to-severe acne vulgaris in patients age 9 and older. It is taken once daily at a weight-based dose, with or without food.
The drug is a narrow-spectrum tetracycline-derived antibiotic described as the first tetracycline developed specifically for acne. According to the American Society for Clinical Pharmacology and Therapeutics in the FDA approval notice, the FDA approved it on Oct. 1, 2018 for that use.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- Who is it for and how do you take it?
- How well does it work?
- What are the common side effects?
- What are the serious risks?
- What should you check before starting?
Who is it for and how do you take it?
Sarecycline is for inflammatory acne, meaning red pimples and pustules, when acne is moderate to severe but non-nodular. It is approved starting at age 9, so both older children and adults may receive it. The labeled dose is about 1.5 mg/kg once daily, set by weight, according to the Seysara label on DailyMed.
The bands are 60 mg for 33-54 kg, 100 mg for 55-84 kg, and 150 mg for 85-136 kg. Take it with adequate fluid to reduce throat and esophagus irritation. Food does not block the dose, which can make a daily routine easier to keep.
How well does it work?
Two identical 12-week trials, SC1401 and SC1402, tested once-daily 1.5 mg/kg in patients ages 9-45. As reported in the Journal of Drugs in Dermatology results, sarecycline significantly reduced inflammatory lesions and increased treatment success versus placebo. That result applies to 12 weeks of use.
Efficacy beyond 12 weeks is not established, and prescribers should reassess use if there is no improvement after 12 weeks. Seysara was also not evaluated for infections. It is an acne drug, not a general antibiotic choice.
What are the common side effects?
The most common adverse event was nausea. A review in the Journal of Clinical and Aesthetic Dermatology, citing the phase 3 data in the safety summary, reported nausea in about 2-4.6% on sarecycline versus about 1.4-2.5% on placebo. Other reported events included nasopharyngitis, headache, and vomiting.
Vestibular and phototoxic events were uncommon, at 1% or less in the trials. Mild symptoms can still matter for daily life, work, and school. Track when nausea, headache, dizziness, rash, or sunburn-like sensitivity starts and how long it lasts.
What are the serious risks?
Like other tetracyclines, sarecycline carries risks of fetal harm, permanent yellow-gray-brown tooth discoloration during tooth development, Clostridioides difficile diarrhea, intracranial hypertension, and photosensitivity. These risks come from the product label and apply even when common side effects are mild.
Seek prompt care for warning signs such as: Do not use sarecycline in pregnancy. People who could become pregnant need a clear plan before starting.
- severe, watery, or bloody diarrhea, with or without cramps and fever
- severe headache, vision change, dizziness, or ringing in the ears
- blistering sunburn, rash, trouble swallowing, or chest pain
- signs of pregnancy while taking the drug
What should you check before starting?
Antacids with magnesium, aluminum, or calcium, magnesium laxatives, and iron products can reduce sarecycline effectiveness. The label directs spacing Seysara 2-6 hours apart from them as directed. Bring a full list of prescriptions, vitamins, minerals, antacids, and supplements to the visit.
Ask how long to stay on treatment, what topical care to continue, and when to return if lesions do not improve by 12 weeks. Safety beyond 12 months is not established. That limit makes follow-up visits important for deciding whether to stop, switch, or continue another acne plan.