Hi, I’m a vet tech. I have no vested interest in your money, I assure you. We used to tell our clients to only use flea and tick prevention on their indoor cats in the warmer months. Then we had a very mild winter. And yeah, a lot of our exclusively indoor cats came in infested with fleas for the first time ever. Just because it’s winter, doesn’t mean these bugs aren’t out there. Believe me, it’s a lot easier to prevent fleas than get rid of them. For an indoor cat, I would recommend Revolution. We don’t really worry about ticks so much in cats, especially indoor ones, but fleas are a different story.
Revolution also does heartworm, which is important, because one worm can kill a cat. And mosquitoes can get in the house quite easily. And there’s no treatment for heartworm cats like there is for dogs. Again, prevention is the way to go. Indoor cats probably don’t need heartworm prevention in the winter months (at least in Jersey, can’t speak for MO), but since it’s bundled with the Revolution, it’s a nice bonus.
This isn’t the place to be cheap. It’s not just an issue for the animals, it’s for your safety. Do you want a house infested with fleas? Revolution also deworms monthly for rounds and hookworms, which a cat could pick up by catching and eating a mouse. And those parasites are zoonotic.
Any preventative that does heartworm will be prescription, so you have to get it through your vet. You do NOT have to test cats for heartworm before starting the medication. Frontline Plus, which kills fleas and ticks and has an IGR (prevents flea eggs from developing into adults) can be obtained in pet stores, I think. It’s not prescription. Check with your vet though. For instance, we price-match our Frontline, and there are usually deals from the pharm company for our clients (such as buy 6 months, get two free).
You need to find a vet you trust. Trustworthy vets would never recommend something just for profit.
Also, please take your cat to the vet yearly. This animal depends on your for its well-being, and a lot of times, physical exams let us find problems at a stage when they are still treatable.