 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] . Protect ointments from freezing. Some preservative-free drops that come in single-use vials/droppers should be discarded either immediately after use or up to 12 hours after opening. Check your product package to see when you should discard your preservative-free product. If you have any questions about storage, ask your pharmacist. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.The uses of Xalatan Ophthalmic (Eye): Latanoprost is used to treat high pressure inside the eye due to glaucoma (open angle type) or other eye diseases (such as ocular hypertension). It is similar to a natural chemical in the body (prostaglandin) and works by regulating the flow of fluid within the eye which results in lower pressure. Lowering high pressure inside the eye helps to prevent blindness. How to use Xalatan Drops Apply this medication in the affected eye(s) as directed by your doctor, usually once daily in the evening. Do not use latanoprost more often because </s>