Is diarrhoea profitable to sell on Amazon United Kingdom?

The niche generates £1.1M/yr across 20 tracked products. 4 of 4 products launched in the last 360 days are still selling. 90-day search growth is +0.9%. Flapen's verdict: Worth a look (52/100).

How competitive is the diarrhoea niche?

12 brands and 73 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 86% of demand.

What do buyers complain about in diarrhoea?

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

When does demand for diarrhoea peak?

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

What does it cost to enter the diarrhoea niche?

Listings span £2.44–£22.51; the average listing price is £6.24 (sweet spot $15–$100). The average incumbent carries 951 reviews — the moat a new listing must climb.

diarrhoea

Worth a look

Shows searches that convert (24.3% search→purchase), but pricing outside the sweet spot ($6.24 avg) keeps it on the watch list.

Conversion

Incredible24.3%

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

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Market size

Great£1.1M

£1.1M/yr · 733K searches

Review moat

Good951.15

avg incumbent reviews — the moat a new listing must climb

Price range

Okay£2.44–£22.51

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

Competition

Okay66%

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

Brand share

Okay86%

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

Growth

Okay+0.9%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Avg price

Bad£6.24

avg listing price — sweet spot $15–$100

According to Flapen's Amazon United Kingdom niche tracking, diarrhoea is a £1.1M/yr Amazon United Kingdom market (733K searches/yr). The top 5 brands hold 86% of demand. Verdict: Worth a look — 52/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

diarrhoea market data

Units sold / yr: 150K–200K; avg 6,000–8,000/product
Revenue / yr: £936K–£1.2M; units × avg price
Conversion rate: 24.3%
Avg BSR: #15
Page quality: 0%
Prime: 95%
Sponsored: 80%
Out of stock: 0.0%
Avg brand age: 80 months
Avg seller age: 171 days

Competition & brand share

The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 rising

Sellers

Top-5 brand share

86%

Top 20: 100%

Top-5 click share

66%

Top 20: 100%

Open market

11%

Imodium60%
Loritax9%
BECKYS CHOICE7%
Galpharm7%
Generic4%
TDY Store4%
Open — no brand owns it (6 brands, 11%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +0.9% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.8×

Open Trend

Top diarrhoea search terms

imodium343K/yr +1.8%21.7% conv.
diarrhea tablets for adults63K/yr +16.6%20.4% conv.
diarrhea tablets80K/yr +9.8%18.2% conv.
imodium tablets56K/yr -14.1%19.8% conv.
immodium51K/yr -9.4%24.8% conv.
anti diarrhea tablets28K/yr +14.0%18.4% conv.
diarrhoea relief16K/yr +81.9%13.1% conv.
diarrhea relief24K/yr -30.7%13.2% conv.
diarrhoea tablets13K/yr +12.5%16.3% conv.
diarrhea10K/yr +4.5%13.1% conv.

All search terms

Top diarrhoea 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 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Imodium Instants (1 x 6 Tablets) Loperamide Dissolving Tablets for On-The-Go Diarrhoea Relief Treats Short-Term and IBS Diarrhoea Helps Restore Your Natural Rhythm for Adults and Children Aged 12+

Imodium£3.244.7★3,783 rev

Imodium Capsules Original Relief from Diarrhoea (6 Capsules) Helps Restore Gut to Natural Rhythm with Loperamide Hydrochloride Fast-Acting Diarrhoea Relief in 1 Hour with Just 1 Dose

Imodium£2.454.7★710 rev

Imodium Dual Action Diarrhoea Relief (6 Tablets) Helps Restore Gut to Natural Rhythm with Loperamide Hydrochloride & Simeticone Diarrhoea Tablets for Cramping Bloating and Wind

Imodium£3.774.6★2,149 rev

48 Diarrhoea Relief 2mg Capsules Loperamide Hydrochloride Tablets (8x6)

Loritax£5.524.6★5,210 rev

60 Anti Diarrhea Loperamide 2mg Capsules (10 Packs - 6 Capsules Each) Fast-Acting Anti Loose Motion Instant Diarrhoea Relief Tablets

BECKYS CHOICE£8.184.6★281 rev

Newest

by launch date

Diarrhoea Relief (6 Pack) 36 Loperamide Hydrochloride GSL TDY Bundle Including Diarrhoea Causes & Relief Guides + Stool Chart & Recording Chart - Packaging May Vary

TDY Store£7.44445 rev

2mo ago

60 Anti Diarrhoea Tablets Anti Loose Motion Instant Diarrhea Capsules - Helps Restore Gut to Natural Rhythm by HydraSole - Packaging May Vary

HydraSole£7.8922 rev

6mo ago

36 Diarrhoea Relief Instants 2mg Orodispersible Tablets (6 Packs) - Melts in The Mouth

BECKYS CHOICE£8.27136 rev

11mo ago

Diarrhoea Relief 2mg 6 Capsules Loperamide Hydrochloride Tablets - Pack of 5 Fast-Acting Anti Loose Motion Instant Diarrhoea

Generic£3.86337 rev

11mo ago

72 Diarrhoea Relief Capsules (12 Boxes) TDY Bundle Including Diarrhoea Causes & Relielf Guides + Stool Chart & Recording Chart - 12 x 6 - Anti Diarrhoea Tablets

TDY Store£8.90116 rev

1y ago

What buyers say about diarrhoea

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

What buyers love

Value For Money24%

“Excellent value for money”

Advertised Vs Actual Product20%

“As advertised”

Efficiency16%

“Works well”

Quality-Overall14%

“Great product, As described”

Ease Of Use5%

“Easy to use”

Dosage3%

“The pills are very good”

Acid Regulator/Stomach Ache Relief2%

“A life saver for tummy issues”

Ease Of Chewing/Swallowing2%

“ease of swallow many thanks pete”

Functionality-Overall1%

“They do the job”

Side Effects1%

“No side effects”

What buyers complain about

Value For Money22%

“Waste of money”

Functionality-Overall15%

“Does not work or help”

Ease Of Use11%

“no use”

Dosage9%

“Dosage is a matter of trial and error as we are all individuals and probably have different reasons fir considering this product”

Taste-Overall6%

“Tastes awful”

Advertised Vs Actual Product4%

“Im fairly certain if I had it analyzed it would not be what it claims to be”

Blood Sugar Level4%

“DO NOT USE IF YOU ARE GLUCOSE INTOLERANT”

Flatness4%

“Not delivered to flat's”

Regulates Digestion2%

“wrongly used cause constipation”

Adhesion/Stickiness2%

“tablets stick to roof of mouth”

Common questions

Is diarrhoea profitable to sell on Amazon United Kingdom?: The niche generates £1.1M/yr across 20 tracked products. 4 of 4 products launched in the last 360 days are still selling. 90-day search growth is +0.9%. Flapen's verdict: Worth a look (52/100).
How competitive is the diarrhoea niche?: 12 brands and 73 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 86% of demand.
What do buyers complain about in diarrhoea?: Top complaints mined from reviews: Value For Money, Functionality-Overall, Ease Of Use. The return rate is 0.0%.
When does demand for diarrhoea peak?: Demand is steady year-round — the busiest month runs 1.8× the quietest.
What does it cost to enter the diarrhoea niche?: Listings span £2.44–£22.51; the average listing price is £6.24 (sweet spot $15–$100). The average incumbent carries 951 reviews — the moat a new listing must climb.