What it is used for
- Acne
- Blackheads and whiteheads
- Some signs of sun-related skin ageing (when prescribed)
How it works
Tretinoin is a vitamin-A-derived medicine that speeds up the turnover of skin cells, unblocking pores and reducing the formation of new acne spots.
How it is taken
Comes as a cream or gel, usually a prescription product. Apply a thin layer to clean, dry skin exactly as your clinician directs, generally at night. Skin commonly becomes dry, red and more sensitive at first and may worsen before improving; use sun protection and a moisturizer.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Dryness, peeling and flaking
- Redness, warmth or stinging
- Increased sensitivity to sunlight
Serious effects — get help
- Severe burning, blistering, swelling or crusting
- Severe sunburn on treated skin
- Signs of an allergic reaction such as facial swelling, hives or difficulty breathing
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Other peeling, drying or strong acid products increase irritation
- Wax hair removal on treated skin can damage it
- Some products and sun exposure increase sensitivity
Who should take care
- Tell your clinician if you are pregnant, planning pregnancy or breastfeeding before use
- Use daily sun protection and avoid strong sun and sunlamps
- Apply only a thin layer; more increases irritation without faster results
- Avoid the eyes, lips, nostrils and broken or sunburned skin