No lice preventive spray helps stop the chances of lice spreading this preventive spray contains natural repellents that help keep lice awayto be used when lice have been detected in the environment or when school starts repeat daily simply spray the hair and lice will come nowhere near for a minimum of 7 hoursit is a natural formula that is non allergenic so is suitable if a child suffers from asthma it is suitable for adults and children over the age of 2 years so you can p