Rozex metronidazole cream. Metronidazole is an antimicrobial drug used to treat bacterial and protozoal infections. Rozex is particularly targeted at the treatment of the skin disorder rosacea. Rosacea usually begins from a temporary flushing of the face, for example after drinking alcohol. It then develops into a permanent reddening of the skin. The cause of this skin condition is usually unknown, but it affects white-skinned people of mostly north-western European descent and may result from overuse of corticosteroid creams. Rozex is manufactured by Galderma Laboratories.