Revolution

I was reading Marietta's medical records_Marietta is a former feral I adopted from a shelter_ and saw the word "Revolution" in the Surgery column; "4-1 Spayed..she's over grooming herself...8-5 Revolution" I understand until "..ng herself" but what is Revolution?
Thanks!..Marietta and I are getting to know each other..I'm walking on clouds

Revolution is a flea/tick/heartworm/roundworm/earmite topical solution. They probably just annotated when they applied it.