Xalatan (latanoprost) is the most widely used glaucoma medicine in the world. It has few
side effects, it makes the lashes grow longer which most people don't mind. The package warning about changing iris color is only an iris with brown/blue mixed. The Azarga contains a beta blocker and that can cause a lot of problems: slow pulse, cold feet, loss of energy, low blood pressure, chronic cough, wheezing and the other ingredient bromonidine can cause red irritated eyes and eyelids.