Brimonidine
"Used mervosa for just a few days and every day when the medicine wore off my face got progressively worse with extreme redness and a burning sensation. My face is hot and I will never try anything unnatural on my face again. I should have been more wary of my dermatologist when recommended cataphil after I told him I don't use anything with parabens or suldates in it. Lesson learned, I suppose....."