 [ Symptoms ] what should i do if i suspect an overdose of a 200 lice treatment [ Disease ] this medication may be harmful if swallowed or inhaled if swallowing inhaling or overdose is suspected contact your local poison control center or emergency room immediately us residents can call the us national poison hotline at 1 800 222 1222 canada residents can call a provincial poison control center if this product is swallowed or inhaled symptoms may include nausea vomiting diarrhea unusual drowsiness