2. Oral Medications
If you don’t like the idea of using a topical medication on your cat or dog, there are a few different monthly oral medications available. Some products not only kill fleas and ticks, they also prevent heartworm disease in dogs and cats and even some internal parasites like roundworms, hookworms, and whipworms. Side effects of oral flea and tick preventive medications are generally few, but can include vomiting and diarrhea. Some animals may develop a skin reaction that causes redness, itching, and/or hives to develop. Depression and lack of appetite have also been reported.