Expert: Dr. Louis N. Gotthelf - 12/5/2009

Question
I applied frontline spot on treatment to my 6 month old miniature schnauzer 2 weeks ago but he still has fleas if anything they are worse. I have sprayed the house also. the poor pup cant seem to settle because of them. would it harm him to apply it again. thanks

Answer
Frontline is very safe, so re-apply it.  There are fleas still in the house and they may take a while to get rid of.  You need to re-spray in the house every 2 weeks for three treatments.  Vacuum everything really well and get rid of the vacuum bag.  Make sure you spray under things like the chairs, coffee table, beds, etc., since that's where the flea larvae are located.