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Diphenhydramine

Fail

The top 5 products take 100% of clicks, so Diphenhydramine is a Fail.

Flapen Score
36
36 / 100
Ranks 1,876 of 2,035 Health & Personal Care niches · −12 vs the category median of 48
Market size
£200K/yr244K searches / yr
90-day growth
+16.8%search demand this quarter
Competition
100%top-5 click share · 2 brands · 82 sellers

Flapen Score

Diphenhydramine against its category

The dotted line is the Health & Personal Care average. Past it, Diphenhydramine is stronger. Inside it, weaker.

36Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Diphenhydramine market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Diphenhydramine 244K times last year and spent an estimated £200K. All 2 brands take every click. Flapen scores it 36 out of 100, a Fail.

01 · Demand

16.1% of searches ended in a purchase last week.

Shoppers searched for this 244K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 16.1% of those searches ended in a purchase. Searches in the last 90 days moved +16.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated £200K a year.

Searches, last 12 months
244K
Growth, 90 days vs prior 90
+16.8%
Conversion, latest week
16.1%
Market size, estimated
£200Ka year
Top search term
benadryl97K searches a year

02 · Price

A sale here is worth £5.09.

Listings sell for £5.09 on average, from £3.89 to £6.76. Amazon reports units sold in ranges. This niche sold 30K to 40K a year. The average listing sells 6,000 to 8,000 of them. At £5.09 that is £31K to £41K a year per listing.

Average price
£5.09under the $15 to $100 sweet spot
Price range
£3.89–£6.76
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
30K–40K
Units per listing a year
6,000–8,000
Revenue per listing a year
£31K–£41K
Returns
0.0%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

80% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #13 within Allergy & Asthma Relief. It carries 4,080 reviews at 4.68 stars, so a new listing needs social proof before a better product.

Sponsored listings
80%
Prime listings
100%
Out of stock, average day
0.0%
Average rank
#13in Allergy & Asthma Relief
Average rating
4.68 starsAmazon United Kingdom average 4.36 stars
Average reviews
4,080per listing
Listings tracked
5

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 52 months on average, so the names here are settling in.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
52 months

Products

Top Diphenhydramine products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 100% of clicks. A locked shelf that new listings rarely crack.

£0£30K£60K£90K£120K1001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

2 falling

Sellers

82

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

0%

  • Benadryl96%
  • Crescent Pharma Limited4%

Demand

Diphenhydramine search demand

Weekly searches over the year, seasonality beneath. Pick a range.

8K6KSpike '26DecJanFebMarAprMayJunJul

Peak months: Jun · busiest ÷ quietest = 1.9× · 8 of 12 months tracked

Search terms

Top Diphenhydramine search terms shoppers use

The exact words shoppers type, with yearly volume, growth, and conversion.

  • benadryl97K/yr
  • benadryl allergy relief51K/yr
  • diphenhydramine38K/yr
  • benadryl one a day 30 tablets11K/yr
  • diphenhydramine hydrochloride13K/yr
  • acrivastine8K/yr
  • benadryl for dogs17K/yr
  • benedryl3K/yr
  • diphenhydramine antihistamine2K/yr
  • diphenhydramine tablets3K/yr

Reviews and returns

What reviews say buyers love and hate about Diphenhydramine

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Value For Money21%+1.20

Obviously they're the most expensive tablets

A rip off price

Rip Off Price

Dosage10%−0.04

doesn't contain many doses

not many doses

Only 12 tablets in the box not 24

Age Suitability8%−0.04

It doesn't state age limit on box

Stress/Anxiety8%−0.04

I find these make me drowsy

Functionality-Overall8%−0.04

Didnt work for me

Love

Value For Money34%+1.20

Good value

Amazing value

Great deal

Allergies13%+0.99

Allergy relief

Great for dogs with allergies

Great for food allergies

Fever Relief10%−0.01

The best hay fever relief

hay fever

Great product helps with my hayfever

Efficiency9%+0.63

Very effective

Works well

I found them to be very effective

Advertised Vs Actual Product7%+0.52

Does what it says on the package

Product as described

They Actually work

FAQ

Common Diphenhydramine questions

Answered from the same tracked data.