 <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]  medication on the scalp or nails unless otherwise directed by your doctor. The dosage and length of treatment depends on the type of infection being treated. Do not apply more often or use longer than directed. This may increase the risk of side effects. Use this medication regularly to get the most benefit from it. To help you remember, use it at the same time(s) each day. Continue to use this medication until the full treatment period is finished, even if symptoms disappear after a few days. Stopping the medication too early may result in a return of the infection. Your condition may continue to improve after the full treatment is finished. It may take several weeks after treatment for the infection to completely heal. Inform your doctor if your condition worsens or does not improve within 2 weeks for jock itch and ringworm and within 4 weeks for athlete's foot.The side effects of Terbinafine HCl Topical: Burning, irritation, or itching at the application site may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. If your doctor has directed you to use this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have </s>