Frontline Plus: The Topical That Refuses to Die (and Still Works)
Frontline Plus has been around since 2000. In the age of chewables, a topical might seem outdated. But it still has real advantages: no prescription needed, cheaper per dose, and you do not have to convince a picky dog to eat it. Here is what you should know before buying.
BudgetPetCare
Code FATHER for 25% off + free shipping
How Frontline Plus Works
Frontline Plus is a topical liquid you squeeze onto your dog's skin between the shoulder blades once a month. The two active ingredients are fipronil (kills adult fleas and ticks) and (S)-methoprene (kills flea eggs and larvae, breaking the life cycle).
Fipronil spreads through the oils on your dog's skin and coats the hair follicles. Fleas and ticks absorb it through contact, not by biting. This means Frontline Plus starts killing fleas within 12 hours, and ticks within 48 hours, before they can transmit most diseases. It is waterproof after 24 hours, so bathing and swimming are fine.
Because it sits on the skin rather than circulating in the blood, Frontline Plus has fewer systemic side effects than oral preventives. The trade-off is that you have to apply it correctly and wait for it to dry, and some dogs find the sensation annoying for the first hour.
Pros and Cons
- No prescription needed
- Waterproof after 24 hours
- Kills fleas, ticks, eggs, and larvae
- Cheaper per dose than NexGard or Bravecto
- Fewer systemic side effects than orals
- Safe for pregnant and nursing dogs
- Greasy residue for the first 24 hours
- Kids and other pets should not touch the application site for a few hours
- Some flea populations have developed resistance to fipronil (mainly in Florida and parts of Australia)
- Does not cover heartworm
- Slower tick kill than oral options
Price Comparison: 6-Month Supply (Medium Dog, 23-44 lbs)
| Pharmacy | 6-Month Price | Best Coupon | Per Dose |
|---|---|---|---|
| BudgetPetCare | $84 | FATHER (25% off) | $14 |
| CanadaPetCare | $95 | CPC12ON (12% off) | $16 |
| Chewy | $150 | none | $25 |
| Petco | $165 | none | $28 |
Frontline Plus vs NexGard: Which Should You Pick?
Both products kill fleas and ticks. The real difference is delivery method and speed.
NexGard is faster. It kills fleas in 4 hours and ticks in 24 hours because afoxolaner circulates in the blood and hits parasites the moment they bite. Frontline Plus takes 12 hours for fleas and 48 hours for ticks because fipronil has to be absorbed through contact.
Frontline Plus is easier to get. No prescription means no vet approval process, no waiting. You can order it and have it shipped the same day. For someone who needs flea control now and does not want to deal with the prescription system, that matters.
The resistance issue is worth understanding. In most of the US, Frontline Plus still works fine. In a few regions with heavy agricultural pesticide use (central Florida, parts of Queensland in Australia), some flea populations have developed reduced sensitivity to fipronil. If you live in one of these areas and Frontline has stopped working, switch to an oral like NexGard or Bravecto. They use a different mechanism that resistant fleas have no defense against.
Bottom Line
Frontline Plus is the Toyota Camry of flea preventives. Not the newest, not the fastest, but reliable, cheaper than the alternatives, and it still gets the job done for most dogs in most places. If you want to avoid the prescription system or save $5-10 a month compared to NexGard, this is the one.
If your dog swims every day, you need the fastest possible tick kill, or you live in a flea-resistance hotspot, go with NexGard or Bravecto instead. Otherwise, Frontline Plus is $14 a dose and it works.
Get Frontline Plus with FATHER Code → affiliate link