Tretinoin

Common side effects include redness, peeling, dryness, and a mild stinging or warming sensation at the application site, especially during the first few weeks of use. These effects are usually mild and reversible upon discontinuation.

Important warnings:

• Skin becomes more sensitive to sunlight and wind; minimize sun exposure and use sunscreen daily.
• Avoid contact with the eyes, mouth, nostrils, and mucous membranes.
• Do not apply to sunburned, broken, or eczema-affected skin.
• Wait 20 to 30 minutes after washing your face before applying, and use only a pea-sized amount.
• Gel formulations are flammable; keep away from heat and open flame.

Use with caution alongside other topical acne products, as combined use may increase skin irritation.