
Isotretinoin has many side effects and is normally used to treat severe acne but in low
dosages is proven to be effective against papulopustular and phymatous
rosacea.
Dermatological vascular laser (single wavelength) or Intense Pulsed Light (broad spectrum) machines offer one of the best treatments for rosacea, in particular the erythema (redness) of the skin.
ref:http://en.wikipedia.