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Ask Dr. Michael Salkin Your Own Question
Dr. Michael Salkin
Dr. Michael Salkin, Veterinarian
Category: Dog Veterinary
Satisfied Customers: 28447
Experience:  University of California at Davis graduate veterinarian with 45 years of experience
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Trying to decide on flea med 20 lb 2 yr old mixed breed.

Customer Question

Trying to decide on flea med for my 20 lb 2 yr old mixed breed. I have used Revolution in past for previous dogs, with good results. I know there are many oral meds. I am a nurse, and my thinking that a topical med. would bypass the liver, versus oral going thru digestion.
Submitted: 1 year ago.
Category: Dog Veterinary
Expert:  Dr. Michael Salkin replied 1 year ago.
The two topicals that aren't absorbed at all are imidocloprid (Advantage, e.g.) and fipronil (Fronline, e.g.), Stephanie. The problem with these, however, is that populations of fleas have developed resistance to them. There are many pyrethroid-based products that fit the bill but, once again, fleas have developed significant resistant to pyrethroids. We've moved to a different class of insecticide such as fluralaner (Bravecto) and afoxolaner (Nexgard) - neither of which we've seen resistance to but both are oral chews. Bravecto remains effective for up to 3 months. A new flea collar (Seresto) combines imidocloprid with a pyrethroid (flumethrin) and stays effective for 8 months. Please respond with further questions or concerns if you wish.