Flea medicine for new Lab puppy

Comfortis is supposed to be real good.

gmoney, this is a side issue question, but do you have to give him that medicine all the time? The reason I ask this is because I was told that if your yard buts up continuously against a neighbors(which is more common) that if any of your neighbors have fleas that means they are also in your yard too. And granted, one can buy that yard spray killer, but I have been told it is a major pain to keep on top of and ward them off with continual fleas around ya. Both my neighbor's have dogs on either side of me. And they each have fleas terrible. I cannot see them not itching ever. And their owners do nothing for them/don't care.

I moved in a house 2 years ago that has a nice yard/everything all set up for some dogs, but I have been holding off till I move out. I am not moving out cause of those fleas, but looking for another reason. But I wont dare get my greatly desired dogs with massive flea problems all around me with neighbors. I once had a dog get fleas and those suckers drove me crazy at night/biting me. And they are a major pain in the arse getting rid of out of your house. Many hospitals have flea epidemic issues too that they cannot fully get rid of. Nasty critters. If I am wrong in anything I said about fleas, please do correct me: with dog shots/stuff like this, I am a novice. But just wondering how flea medicine works or is good?