Oral retinoidAccutane / isotretinoin
Reduces oil-gland activity and affects clogged pores, inflammation and acne-associated bacteria across treated skin, not only a spot where a product is applied.
- Often discussed forPersistent, nodular, scarring or treatment-resistant acne after a provider reviews prior therapy
- First changesOften within 4–8 weeks; an early flare is possible and response varies
- Treatment shapeA defined systemic course with dose and duration adjusted to response and tolerability
- AfterwardImprovement may last, but relapse, topical maintenance or another course can still be needed



