 <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]  to a class of medications called anti-infectives. It works by slowing the growth of the yeast that causes the infection. How to use Selsun Blue 1 % Shampoo This medication is for use on the skin only. Some brands require shaking before use. Check your product package to see if your brand needs to be shaken. Before using this medication, remove any jewelry to avoid damage to it. Avoid getting this medication into your eyes, inside your nose or mouth, or on any areas of broken/inflamed skin since it may cause irritation. If this occurs, flush the area with plenty of water. Consult your doctor or pharmacist if you have any questions about how to use this medication properly. For the treatment of dandruff or scalp dermatitis, follow the manufacturer's instructions, or use as directed by your doctor. Wet the scalp and massage the medication onto the wet scalp. Leave it on your scalp for 2-3 minutes and rinse thoroughly. Some brands may require a second application. Check your product package to see if your brand requires a repeat application. Be sure to rinse your hair and scalp well with water after each application, especially on bleached, tinted, or permed hair. This medication is usually used 1 or 2 times per week </s>