I mistakenly applied the 5% (60 gram) permethrin cream to my daughters hair and left it on for 3 hours. I read the scabies directions. She has had experienced headaches & dizziness. Does the scalp absorb the medication faster than the body, as if i were using it for scabies? She is 60 pounds. How long will the medication stay in her body? What type of long term effects could result from this dosage?