I gave my cat some cheap medicine for my cat about 2 1/2 weeks ago for fleas and it hasnt done ANYTHING. I called my vet and was told I have 2 wait 2 more weeks b4 the vet will do anything to treat the fleas. I know that all these fleas are doing is multiplying and I have to do something now. I went to the pet store to buy Frontline but they didnt carry it. I was told Sentry PurrScriptions Plus was the next best thing. The thing is I dont want to have to wait even longer if this doesnt work. Does it work??? I also plan on bombing the house.