Zioptan (tafluprost) and Alphagan P (brimonidine) are both prescription eye drops used to lower high pressure in the eye caused by open-angle glaucoma or ocular hypertension. However, they belong to different medication classes. Zioptan (tafluprost) is a prostaglandin, while Alphagan P (brimonidine) is an alpha agonist. Zioptan is typically used once daily in the evening and comes in single-use containers. In contrast, Alphagan P is used three times daily, about 8 hours apart. Zioptan can cause changes in eye color and eyelash growth, while Alphagan P may lead to dry mouth, headaches, and drowsiness. Additionally, Zioptan is preservative-free, which may be less irritating for some users. Your eye doctor will help you find the right one for you, based on your specific eye health needs, side effect profile, and lifestyle.