Is stool hardener profitable to sell on Amazon United States?

The niche generates $2.3M/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +4.9%. Flapen's verdict: Skip it (44/100).

How competitive is the stool hardener niche?

3 brands and 68 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in stool hardener?

Top complaints mined from reviews: Ease Of Use, Functionality-Overall, Ingredients-Overall. The return rate is 0.0%.

When does demand for stool hardener peak?

Demand peaks in May–Jun; the busiest month runs 2.3× the quietest.

What does it cost to enter the stool hardener niche?

Listings span $3.58–$13.56; the average listing price is $9.50 (sweet spot $15–$100). The average incumbent carries 12,275 reviews — the moat a new listing must climb.

stool hardener

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible16.5%

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

Market size

Incredible$2.3M

$2.3M/yr · 1.5M searches

Growth

Okay+4.9%

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

Avg price

Okay$9.50

avg listing price — sweet spot $15–$100

Review moat

Bad12,274.63

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad91%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Price range

Bad$3.58–$13.56

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

According to Flapen's Amazon United States niche tracking, stool hardener is a $2.3M/yr Amazon United States market (1.5M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in May–Jun. Verdict: Skip it — 44/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

stool hardener market data

Units sold / yr: 300K–400K; avg 50,000–60,000/product
Revenue / yr: $2.9M–$3.8M; units × avg price
Conversion rate: 16.5%
Avg BSR: #36
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 76 months
Avg seller age: 143 days

Competition & brand share

The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

91%

Top 20: 100%

Open market

Amazon Basic Care74%
Imodium20%
Kaopectate6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +4.9% search growth over the last 90 days.

Peak months: May, Jun · busiest ÷ quietest = 2.3×

Open Trend

Top stool hardener search terms

anti diarrhea pills574K/yr -2.8%16.6% conv.
loperamide241K/yr +11.4%12.8% conv.
diarrhea medication for adults155K/yr +13.3%12.4% conv.
anti diarrhea78K/yr +9.5%10.4% conv.
diarrhea medicine52K/yr +22.1%9.7% conv.
antidiarrheal pills60K/yr +5.1%13.8% conv.
anti diarrhea medicine31K/yr +27.9%9.8% conv.
diarrhea43K/yr -23.3%3.8% conv.
loperamide anti-diarrhea pills15K/yr +58.6%15.0% conv.
antidiarrheal25K/yr +44.0%8.6% conv.

All search terms

Top stool hardener 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 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Amazon Basic Care Loperamide Hydrochloride Tablets 2 mg Anti-Diarrheal 24 Count (Pack of 1)

Amazon Basic Care$3.584.7★23,540 rev

Amazon Basic Care Loperamide Hcl 2 Mg Softgels Anti-Diarrheal Easy to Swallow Controls Symptoms of Travelers Diarrhea 24 Count

Amazon Basic Care$7.574.7★6,748 rev

Imodium A-D Diarrhea Relief Caplets with Loperamide HCl Anti Diarrheal Medicine to Help Control Symptoms of Diarrhea Due to Acute Travelers Diarrhea 24 Count

Imodium$10.844.8★20,963 rev

Imodium A-D Anti-Diarrheal Softgels with 2mg Loperamide Hydrochloride for Fast Acting Diarrhea Symptom Relief On the Go in Travel Size Softgels for Adults 12+ 24 Ct

Imodium$13.054.8★16,431 rev

Amazon Basic Care Loperamide Hydrochloride 2 mg and Simethicone 125 mg Tablets Multi-Symptom Relief Anti-Diarrheal Bloating and Cramps Gas Relief 24 Count

Amazon Basic Care$8.364.6★4,096 rev

Newest

by launch date

Kaopectate Multi-Symptom Anti-Diarrheal & Upset Stomach Reliever 84 Caplets Anti Diarrhea Caplets

Kaopectate$12.444,883 rev

5mo ago

Amazon Basic Care Loperamide Hcl 2 Mg Softgels Anti-Diarrheal Easy to Swallow Controls Symptoms of Travelers Diarrhea 24 Count

Amazon Basic Care$7.576,748 rev

2y ago

Kaopectate Multi-Symptom Anti-Diarrheal & Upset Stomach Reliever 42 Caplets Anti Diarrhea Caplets

Kaopectate$6.564,883 rev

5y ago

Amazon Basic Care Loperamide Hydrochloride 2 mg and Simethicone 125 mg Tablets Multi-Symptom Relief Anti-Diarrheal Bloating and Cramps Gas Relief 24 Count

Amazon Basic Care$8.364,096 rev

6y ago

Amazon Basic Care Loperamide Hydrochloride Tablets 2 mg Anti-Diarrheal 24 Count (Pack of 1)

Amazon Basic Care$3.5823,540 rev

6y ago

What buyers say about stool hardener

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

What buyers love

Efficiency19%

“Works perfectly”

Advertised Vs Actual Product17%

“As advertised”

Value For Money14%

“not expensive”

Quality-Overall9%

“As good as the brand name”

Acid Regulator/Stomach Ache Relief6%

“Great for stomach discomfort”

Ease Of Use5%

“Easier to open”

Magnesium3%

“Imodium works very well”

Regulates Digestion2%

“Good for stomach problems”

Dosage2%

“Dosage and Effectiveness”

Ease Of Chewing/Swallowing2%

“I never have issues swallowing pills so it's easy for me”

What buyers complain about

Ease Of Use24%

“Hard to Open”

Functionality-Overall12%

“Product not uszble”

Ingredients-Overall5%

“keopectate has a salicylate ingredient that I did not know it had”

Dosage4%

“Hard to take out pills”

Value For Money4%

“Over priced”

Side Effects4%

“BUT it may react with other medications taken in the same time period in a negative way”

Taste-Overall3%

“I found no taste”

Size-Overall3%

“the tablet is much larger”

Color2%

“though it does turn something a dark color”

Quality-Overall2%

“Cheaper”

Common questions

Is stool hardener profitable to sell on Amazon United States?: The niche generates $2.3M/yr across 8 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +4.9%. Flapen's verdict: Skip it (44/100).
How competitive is the stool hardener niche?: 3 brands and 68 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in stool hardener?: Top complaints mined from reviews: Ease Of Use, Functionality-Overall, Ingredients-Overall. The return rate is 0.0%.
When does demand for stool hardener peak?: Demand peaks in May–Jun; the busiest month runs 2.3× the quietest.
What does it cost to enter the stool hardener niche?: Listings span $3.58–$13.56; the average listing price is $9.50 (sweet spot $15–$100). The average incumbent carries 12,275 reviews — the moat a new listing must climb.