Is heart worm medicine for large dogs profitable to sell on Amazon United States?

The niche generates $64K/yr across 21 tracked products. 4 of 4 products launched in the last 360 days are still selling. 90-day search growth is +12.8%. Flapen's verdict: Skip it (43/100).

How competitive is the heart worm medicine for large dogs niche?

13 brands and 34 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 81% of demand.

What do buyers complain about in heart worm medicine for large dogs?

Top complaints mined from reviews: Functionality-Overall, Value For Money, Indigestion. The return rate is 0.2%.

When does demand for heart worm medicine for large dogs peak?

Demand is steady year-round — the busiest month runs 1.8× the quietest.

What does it cost to enter the heart worm medicine for large dogs niche?

Listings span $13.69–$152.14; the average listing price is $49.59 (sweet spot $15–$100). The average incumbent carries 12,916 reviews — the moat a new listing must climb.

heart worm medicine for large dogs

Skip it

A small market ($64K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.2%

return rate — above 6% kills the launch gate

Avg price

Great$49.59

avg listing price — sweet spot $15–$100

Price range

Good$13.69–$152.14

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Okay+12.8%

90-day search growth — must beat 0% to launch

Brand share

Okay81%

top-5 brand share — brands hold most of the demand

Conversion

Okay3.1%

search→purchase rate — share of searches ending in a sale

Competition

Okay62%

top-5 click share — leaders hold, buyers still browse

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad12,916.24

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$64K

$64K/yr · 42K searches

According to Flapen's Amazon United States niche tracking, heart worm medicine for large dogs is a $64K/yr Amazon United States market (42K searches/yr). The top 5 brands hold 81% of demand. Verdict: Skip it — 43/100.

Data updated Jul 17, 2026 · scored weekly · How we score niches

heart worm medicine for large dogs market data

Units sold / yr: 1K–1K; avg 0–100/product
Revenue / yr: $50K–$62K; units × avg price
Launch success: —; 4 of 4 new (360d)
Conversion rate: 3.1%
Avg BSR: #12
Page quality: 0%
Prime: 62%
Sponsored: 90%
Out of stock: 0.0%
Avg brand age: 50 months
Avg seller age: 149 days

Competition & brand share

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 rising

Sellers

Top-5 brand share

81%

Top 20: 100%

Top-5 click share

62%

Top 20: 99%

Open market

15%

HEARTGARD29%
PetArmor24%
Simparica Trio12%
TRI-HEART PLUS10%
Frontline6%
Nexgard4%
Open — no brand owns it (7 brands, 15%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +12.8% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.8×

Open Trend

Top heart worm medicine for large dogs search terms

heart worm medicine for large dogs36K/yr +16.9%2.5% conv.
heartworm prevention for large dogs2K/yr +49.4%2.1% conv.
heart worm prevention for large dogs4K/yr -44.8%0.9% conv.

All search terms

Top heart worm medicine for large dogs products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 21 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

PetArmor 7 Way De-Wormer for Dogs Oral Treatment for Tapeworm Roundworm & Hookworm in Large Dogs & Puppies (Over 25 lbs) Worm Remover Puppy Dewormer (Praziquantel & Pyrantel Pamoate) 2 Chewables

PetArmor$18.314.6★33,281 rev

HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51-100 lbs (Brown Box) 6 Month Supply of Chews (Heartworm Disease Preventive)

HEARTGARD$86.604.8★175 rev

HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51 -100 lbs (Brown Box) 1 Month Supply of Chews (Heartworm Disease Preventive)

HEARTGARD$17.954.8★84 rev

TRI-HEART PLUS Chewable Tablet for Dogs 51-100 lbs (Brown Box) 6 Chewable Tablets 6-Month Supply

TRI-HEART PLUS$51.054.8★334 rev

Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 48 mg/tab 44.1-88 lbs (Green) 1 Tablet

Simparica Trio$43.594.8★281 rev

Newest

by launch date

Trio Dewormer for Dogs Tablets for Tapeworms Roundworms & Hookworms Pyrantel Pamoate/Praziquantel for Medium and Large Dogs Over 25 lbs 50 Tablets

VetThera$39.8815 rev

2mo ago

De-Wormer for Dogs Oral Treatment of Tapeworm Roundworm & Hookworm Worm Remover (Praziquantel & Pyrantel Pamoate) Wormer Tablets for Medium and Large Dogs 50 Pieces

VetLuminora$34.956 rev

3mo ago

Luckyond Pyrantel Pamoate and Praziquantel De-wormer Tablet for Medium and Large Dogs Chewable Formula

Luckyond$39.8859 rev

6mo ago

Zenectin Dewormer for Dogs Digestive Cleanser Broad Spectrum for All Wormer Hookworms Lung Worms Pin Worms Round Worms

Zencar$38.709 rev

7mo ago

Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 48 mg/tab 44.1-88 lbs (Green) 1 Tablet

Simparica Trio$43.59281 rev

1y ago

What buyers say about heart worm medicine for large dogs

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money24%

“Excellent price”

Quality-Overall18%

“Excellent product”

Ease Of Use14%

“Ease of use”

Advertised Vs Actual Product14%

“Met my expectations”

Pet Friendly7%

“Dogs love them”

Ease Of Chewing/Swallowing3%

“easy to chew for pups”

Allergies2%

“It does not cause any skin irritation”

Time Taken2%

“I saw improvement within a short time”

Strength2%

“Solid and trustworthy”

Taste-Overall1%

“Easy for the dog to taste”

What buyers complain about

Functionality-Overall48%

“Doesn't work”

Value For Money10%

“It gets a little pricey at times”

Indigestion7%

“last night vomiting as well”

Allergies6%

“the itch”

Advertised Vs Actual Product5%

“no info on this”

Instructions/User Manual/Troubleshooting2%

“The instructions are kinda confusing”

Strength2%

“Ineffective”

Durability2%

“Didnt last a month”

Taste-Overall2%

“The dogs didn't like the taste refused to take it”

Ingredients-Overall2%

“Wasn't the same ingredients as the ones I bought at Costco”

Top return reasons

Size-Overall33%

Functionality-Overall22%

Advertised Vs Actual Product17%

Value For Money11%

Ease Of Chewing/Swallowing4%

Leak-Proof2%

Certifications2%

Defective Material/Parts2%

Compatibility-Overall1%

Weight Heavy1%

Common questions

Is heart worm medicine for large dogs profitable to sell on Amazon United States?: The niche generates $64K/yr across 21 tracked products. 4 of 4 products launched in the last 360 days are still selling. 90-day search growth is +12.8%. Flapen's verdict: Skip it (43/100).
How competitive is the heart worm medicine for large dogs niche?: 13 brands and 34 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 81% of demand.
What do buyers complain about in heart worm medicine for large dogs?: Top complaints mined from reviews: Functionality-Overall, Value For Money, Indigestion. The return rate is 0.2%.
When does demand for heart worm medicine for large dogs peak?: Demand is steady year-round — the busiest month runs 1.8× the quietest.
What does it cost to enter the heart worm medicine for large dogs niche?: Listings span $13.69–$152.14; the average listing price is $49.59 (sweet spot $15–$100). The average incumbent carries 12,916 reviews — the moat a new listing must climb.