Brimonidine
"My dermatologist gave me a sample to try on my arms for keratosis pilaris rubra (I also have mild rocasea on my face). I was amazed at how quickly the redness on my arms disappeared. Usually I do a lot of research before trying new products, especially those that are prescription and not life saving. Unfortunately this time I was in a rush to leave home and didn't. Approximately 24 hours later both arms went beet red. They burned for hours. Finally the redness subsided but it happened again about 24 hours after that (only one arm this time). I was not in contact with any normal triggers i.e. sun, alcohol, etc. After one application the rebound occurred. How long before it goes back to normal?"