noun
- a form of vitamin A used in topical medications to treat acne and reduce signs of aging
Usage: medical
Examples
- The dermatologist prescribed tretinoin cream for her acne.
- Tretinoin can cause skin irritation when first used.
- Many anti-aging products contain tretinoin as an active ingredient.
- She applied tretinoin only at night as directed by her doctor.
- The pharmacy required a prescription for the tretinoin gel.
- Tretinoin helps speed up skin cell turnover.
- Patients using tretinoin should wear sunscreen daily.