 <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]  your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.The precautions of Xalatan Ophthalmic (Eye): Before using latanoprost, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients (such as preservatives like benzalkonium chloride), which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: other eye problems (such as macular edema, iritis/uveitis, lens extraction/aphakia, herpes infection of the eye). If you develop an eye infection or injury, or have eye surgery, check with your doctor about the continued use of your current bottle of latanoprost. You may be advised to start using a new bottle. After you apply this drug, your vision may become temporarily blurred or unstable. Do not drive, use machinery, or do any activity that requires clear vision until you can do it safely. During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is </s>