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Daniel Brady · NH-Licensed Pesticide Applicator · License #782664
Reviewed by Daniel Brady

Is Fastrac Blox Rodenticide with Bromethalin Safe for Pets?

Not pet-safe
No — and it's important to understand why this one is mechanistically different from most other baits in this cluster.Fastrac Blox uses bromethalin, a neurotoxicant, not an anticoagulant. It disrupts energy production in nerve cells, causing brain swelling, and it has no antidote — treatment is supportive care only, which makes fast veterinary attention even more critical than with an anticoagulant exposure. Cats are especially sensitive to bromethalin. The bait is highly palatable and single-feed acute, so any pet with access to the block — or to a bromethalin-poisoned rodent — faces a real, time-sensitive emergency. Never use 'Vitamin K' or clotting language for this active; it does not apply.

At a Glance

  • Product: Fastrac Blox Rodenticide with Bromethalin by Bell Laboratories · Bell Laboratories
  • Active ingredient: Bromethalin 0.01%
  • Re-entry: Ongoing — for the full duration the bait is in service.
  • Cat owners: Cats differ — read the cat card below
The verdict for pet owners

The short, honest answer

Pet-safety score
10out of 100
Not pet-safe

The score rolls up every per-species verdict below, weighted by the honest exposure that matters — a chewed-open tube, not a hidden dab — and is checked against the EPA label and veterinary toxicology.

The verdict
Not pet-safe

Not an anticoagulant — a fast-acting nerve toxin with no antidote, which makes prompt action even more critical if a pet is exposed.

Fastrac Blox's own label states it plainly: "Contains the nerve poison Bromethalin. This product is not an anticoagulant type rodenticide." Bromethalin 0.01% (EPA Reg. No. 12455-95) disrupts cellular energy production in nerve tissue, causing cerebral edema, and acts fast. Unlike anticoagulant baits, there is no Vitamin K1 antidote and no clotting-based treatment pathway — prevention of access is effectively the entire safety margin. Cats are especially sensitive to this active. This is never a safe product for any pet to access, directly or through a poisoned rodent.

General information, not veterinary advice. For a suspected exposure, contact your veterinarian or a pet-poison hotline. Verdict checked 2026-07-13 against the EPA label and veterinary toxicology.

Safety by pet

It's not one answer — it's one per animal

Cats, birds, and fish routinely differ sharply from dogs. That contrast is the whole point of this scorecard, and no manufacturer page draws it.

Scorecard at a glance
  • DogsAvoid
  • CatsAvoid
  • Small mammalsAvoid
  • BirdsAvoid
  • FishCaution
DogsAvoid

Fast-acting, palatable bait — no antidote if a dog eats it

The block is single-feed acute and appealing to a dog, and because bromethalin has no antidote, neurologic toxicity can be rapid and severe if access isn't fully prevented.

Merck Veterinary Manual — Bromethalin Poisoning in Animals

CatsAvoid
Cats differ — added blood-disorder risk

Cats are exquisitely sensitive to bromethalin

Veterinary sources specifically flag cats as unusually sensitive to bromethalin's neurotoxic effects, and secondary risk from a poisoned rodent is also possible.

VCA Animal Hospitals — Bromethalin Rodenticide Poisoning in Cats

Small mammalsAvoid

Target taxon — any exposure is lethal

A pet rat, mouse, hamster, or guinea pig is close enough to the target species that any accessible bait is a direct, undiminished poisoning hazard.

NPIC Rodenticides fact sheet

BirdsAvoid

Labeled extremely toxic to birds

The product label lists extreme toxicity to birds; any bird with access to bait or an affected rodent carcass is at risk.

EPA product label

FishCaution

Keep bait away from water sources

The label lists an aquatic-toxicity caution; the realistic indoor concern is contaminated bait reaching a tank, not direct ingestion by a fish.

EPA product label

The chemistry, in plain terms

What's in it — and what it does to pets

Bromethalin
0.01% · Non-anticoagulant rodenticide (neurotoxicant)Disrupts cellular energy production in nerve tissue, causing cerebral edema
Bromethalin

A neurotoxicant, mechanistically distinct from anticoagulant rodenticides — it disrupts cellular energy production (uncoupled oxidative phosphorylation) in nerve tissue, causing cerebral edema. Signs are neurologic, not bleeding-related, and can appear rapidly with a higher exposure or be delayed one to several days with a lower one. There is no antidote; veterinary treatment is supportive care focused on reducing brain swelling, which is why preventing any access is the entire safety margin.

Most at riskCatsDogsSmall mammals

Merck Veterinary Manual — Bromethalin Poisoning in Animals; Pet Poison Helpline

The actionable core

How to use it safely around pets

Because bromethalin has no antidote, safe use here means preventing any access at all — there is no margin for a 'mostly secure' placement.

Use only inside a locked, tamper-resistant station

Secure the block on a rod inside a station a pet cannot open — never leave it loose or exposed.

Watch out
Given there's no antidote, station integrity matters even more here than with anticoagulant baits.

Place and monitor professionally where possible

Professional placement by a licensed applicator reduces the odds of a placement error in a home with pets.

Watch out
Confirm current state sale/use restrictions before purchase — not for sale in some states.

Collect and dispose of rodent carcasses promptly

Wearing gloves, remove any dead or dying rodents quickly to limit secondary-exposure risk to pets.

Watch out
A bromethalin-affected rodent remains hazardous to whatever eats it.

Keep pets fully excluded from treated areas

Because there's no antidote, treat any treated area as strictly off-limits to pets for the full duration bait is active.

Watch out
There is no re-entry timing that makes an active bromethalin station safe for unsupervised pet access.
The re-entry rule

There is no safe 'dry time' — this active has no antidote, so pets should never have any access to a station using this product.

Ongoing — for the full duration the bait is in service.

If exposure is ever suspected, treat it as an urgent, time-sensitive emergency — bromethalin can act fast.

Rather not manage rodenticide bait around your pets?

Anchor's licensed NH technicians place and monitor rodent control so your pets never have to be near the bait.

Get a Free Pet-Safe Inspection(603) 785-0118
If something's off

Symptoms to watch for

A sign, its urgency, and what to do — never a diagnosis. When in doubt, the emergency panel below is one tap away.

  • Muscle tremors

    Neurologic sign — not a bleeding sign

    Serious

  • Loss of hind-limb use, incoordination, or paralysis

    Serious

  • Involuntary eye movements

    Serious

  • Depression progressing toward coma

    Emergency

  • Seizures

    Seek emergency veterinary care immediately — onset can be within hours of a larger exposure, or delayed 1–4 days with a smaller one

    Emergency
If your pet was exposed

Act now — call a vet or a pet-poison line

Do not induce vomiting unless told to

If your pet ate bait, chewed into a station, or may have eaten an affected rodent, act now — bring the packaging or a photo of the label when you call. This active has no antidote, so time matters. This page is general information, not veterinary advice — for a suspected poisoning, contact your veterinarian or ASPCA Animal Poison Control (888-426-4435) right away.

What each situation calls for

  • Your pet ate bait or chewed into a station

    Call your vet or ASPCA Animal Poison Control immediately — do not wait for symptoms. Because bromethalin has no antidote and can act within hours, early decontamination and supportive care matter more than with a delayed-onset anticoagulant.

  • Your pet is showing tremors, incoordination, or seizures

    This is an emergency. Get your pet to a veterinarian or emergency animal hospital immediately and call ahead if possible so they can prepare — bring the product packaging.

In the next 60 seconds

  1. Get your pet away from the bait, station, or any dead/dying rodent.
  2. Do NOT induce vomiting or attempt any home treatment unless a veterinarian or poison expert tells you to.
  3. Save the packaging — the EPA registration number and 'bromethalin' on the label tell the vet this is a neurotoxicant exposure, not a bleeding one; there is no antidote, so time matters.
  4. Call your veterinarian or one of the hotlines below immediately, even before symptoms appear.
Lower-risk options

Safer pet-friendly alternatives

Honest options that reduce or remove pet-toxicity — no affiliate hype, real caveats included.

Victor Tin Cat live-catch trap

Safer

Live-catch, no toxicant

No poison and no lethal mechanism — a genuine alternative to a no-antidote neurotoxicant, and the safest format in this cluster for a home with pets.

Requires daily checks to release captured mice promptly.

Enclosed electronic traps

Safer

Electronic, no toxicant

The kill mechanism sits in a recessed chamber sized for a rodent, generally out of reach for typical dogs and cats.

Keep away from very small pets who could fit inside the entrance.

Anticoagulant bait (if a toxicant is unavoidable and cats are not in the home)

Safer

Vitamin-K-responsive bait

Anticoagulant rodenticides at least have an established antidote pathway (Vitamin K1) if caught early, unlike bromethalin.

Still never 'safe' — carries its own primary/secondary poisoning risk and must be locked in a station.

Professional pet-safe rodent control (Anchor Pest Services)

Safer

Licensed professional service

Given bromethalin's no-antidote profile, a licensed applicator can help you weigh a genuinely lower-risk option before resorting to this active.

A service, not a product — ask for a pet-safety-focused plan.

Local to New Hampshire

Pet-safe rodent control in New Hampshire

Bromethalin is a neurotoxicant with no antidote, and a poisoned rodent stays hazardous to whatever eats it — in New Hampshire that includes the barred owls, red-tailed hawks, and great horned owls that hunt and scavenge mice and rats across the state. Applying rodenticide for hire here requires an applicator licensed under RSA 430 through the NH Department of Agriculture, Markets & Food. Anchor Pest Services serves Manchester, Nashua, Concord, and the surrounding towns with licensed, pet-conscious rodent control that keeps a no-antidote toxicant well away from your pets.

Anchor Pest Services

NH-licensed applicator #782664 (NHDAMF, RSA 430) · NEPMA member · family-owned since 2017.

Service Area Map

Southern New Hampshire

BristolPop. 3,200LoudonPop. 5,500ConcordPop. 43,900HooksettPop. 14,800GoffstownPop. 18,000AuburnPop. 5,700ManchesterPop. 115,600BedfordPop. 23,300LitchfieldPop. 8,500AmherstPop. 11,300DerryPop. 34,500MilfordPop. 15,700HudsonPop. 25,600NashuaPop. 91,100SalemPop. 30,000HQCityHover for info
Common Questions

Frequently asked questions

Sources(6)
  1. [1]
    Bell Laboratories — Fastrac All-Weather Blox Safety Data Sheet

    Active ingredient confirmation (bromethalin 0.01%), EPA Reg. No. 12455-95, 'not an anticoagulant' label statement

    manufacturerverified 2026-07-13
  2. [2]
    EPA — Pesticide Product Label, Fastrac All-Weather Blox (Reg. No. 12455-95)

    Registered label, bird/mammal hazard statements

    epa_labelverified 2026-07-13
  3. [3]
    Merck Veterinary Manual — Bromethalin Poisoning in Animals

    Mechanism, no antidote, clinical signs and onset timeline

    veterinaryverified 2026-07-13
  4. [4]
    VCA Animal Hospitals — Bromethalin Rodenticide Poisoning in Cats

    Feline sensitivity to bromethalin

    veterinaryverified 2026-07-13
  5. [5]
    Pet Poison Helpline — Bromethalin Is Toxic to Dogs

    Onset timeline, lack of antidote, treatment approach

    pet_poisonverified 2026-07-13
  6. [6]
    ASPCA — Poison Alert: Beware of Bromethalin

    Emergency guidance, class-level bromethalin risk

    aspcaverified 2026-07-13

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

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Last updated 2026-07-13

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