 <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]  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 to treat dandruff or seborrheic dermatitis, or less often to maintain control of dandruff. For the treatment of tinea versicolor, apply selenium sulfide to the affected skin. Lather with a small amount of water. Allow it to remain on your skin for 10 minutes. Rinse your skin thoroughly with water after each use. If the medication touches the genital areas or skin folds, rinse the area well with water for a few minutes to prevent irritation. This medication is applied usually once daily for 7 days to treat tinea versicolor, or use as directed by your </s>