 <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]  medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.The precautions of Selsun Blue Topical: Before using selenium sulfide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, 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: red/irritated/broken skin. This medication is not recommended for children younger than 2 years. Consult your doctor before using this medication. If you are using selenium sulfide on the body for tinea versicolor, this medication should be used during pregnancy only when clearly needed. Discuss the risks and benefits with your doctor. It is unknown if this drug passes into breast milk. Though there have been no reports of harm to nursing infants, consult your doctor before breast-feeding.The interactions of Selsun Blue Topical: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including </s>