Sima:
I do not know anything about Control,
but if you can find out anything on the package, their should be a phone number on the box where you can call the manufacturer and ask them.

Same thing with any flea product,
Call the manufacturer number on the package or ask your vet if you can not find the
answer on the instructions.
A co-worker used Advantage on on his heavely flea infested dogs, and with-in 24 hours his dogs were flealess.