Frontline Plus vs. Frontline Gold: Which Flea & Tick Shield Wins for Your Dog?
Frontline Plus and Frontline Gold are prescription-grade spot-ons that kill fleas, ticks, and lice on dogs. Both use fipronil and (S)-methoprene; Frontline Gold adds a third agent, pyriproxyfen, for faster egg and larva wipeout.
Pet parents confuse them because the boxes look identical—same teal stripe, same dog silhouette. The “Gold” stamp is tiny, and online sellers often lump them together under “Frontline,” so hurried shoppers click the cheaper option without noticing the formula change.
Key Differences
Frontline Plus starts killing fleas in 12 hours and ticks in 48. Frontline Gold knocks fleas down in 30 minutes and ticks in 12, thanks to pyriproxyfen. Gold costs ~15% more but covers an extra life stage, breaking the flea cycle faster.
Which One Should You Choose?
Pick Frontline Plus for routine monthly prevention in low-to-moderate parasite areas. Choose Frontline Gold if your dog swims often (waterproof in 2 hrs) or you’re battling an existing flea explosion. Both are safe for pups 8 weeks and up.
Can I switch between products mid-season?
Yes—just wait 30 days between doses and confirm weight band matches.
Do fleas become resistant?
Resistance is rare; missed applications or environmental reinfestation are the usual culprits.
Is bathing allowed?
Wait 48 hours after application, then gentle dog shampoo is fine.