What is the ingredient in RETIN-A MICRO?
RETIN-A MICRO contains tretinoin, the same active ingredient in RETIN-A® and RENOVA®. RETIN-A and RETIN-A MICRO are indicated for acne. Full U.S. Prescribing Information Back to Top What are microspheres and how does the Microsponge® system work? Microspheres are round microscopic particles made of synthetic polymer. These particles hold tretinoin in the Microsponge® system, and the microsponges with the drug are formulated into a gel. The microspheres hold the medication in reserve, allowing the skin to absorb small amounts of tretinoin over time. Dermatologists who conducted the clinical studies believe this may be why most RETIN-A MICRO patients experience little or no irritation. The microspheres themselves remain on top of the skin and are easily washed off when you shower or wash your face. Full U.S. Prescribing Information Back to Top How long do the microspheres stay on the skin? The microspheres do not penetrate the skin barrier. The microspheres remain on top of the skin and
