I know a lot of people will tell you things to use. If I had fleas in my home, I would hire a professional and be done with it.
I used to use Advantage monthly for fleas...and Heartgard for heartworm prevention. I no longer do flea treatment because my pups simply do not get them. Not sure how I am so lucky, but I will take it.
I never had a problem with Advantage....used it for years.