Skip to content

Diphenhydramine

Fail

Prices span $4.12–$10.33, mostly outside the sweet spot, so Diphenhydramine is a Fail.

Flapen Score
43
43 / 100
Ranks 10,775 of 14,768 Health & Household niches · −6 vs the category median of 49
Market size
$532K/yr533K searches / yr
90-day growth
+0.3%search demand this quarter
Competition
71%top-5 click share · 11 brands · 60 sellers

Flapen Score

Diphenhydramine against its category

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

43Fail
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 States searched for Diphenhydramine 533K times last year and spent an estimated $532K. The top 5 brands take 84% of clicks. Flapen scores it 43 out of 100, a Fail.

01 · Demand

An estimated 12.1% of those searches ended in a purchase.

Shoppers searched for this 533K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 12.1% of those searches ended in a purchase. Searches in the last 90 days moved +0.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $532K a year.

Searches, last 12 months
533K
Growth, 90 days vs prior 90
+0.3%
Conversion, latest week
12.1%
Market size, estimated
$532Ka year
Peak month
May1.3× the quietest month
Top search term
diphenhydramine249K searches a year

02 · Price

A sale here is worth $8.24.

Listings sell for $8.24 on average, from $4.12 to $10.33. Amazon reports units sold in ranges. This niche sold 60K to 80K a year. The average listing sells 4,000 to 5,000 of them. At $8.24 that is $33K to $41K a year per listing.

Average price
$8.24under the $15 to $100 sweet spot
Price range
$4.12–$10.33
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
60K–80K
Units per listing a year
4,000–5,000
Revenue per listing a year
$33K–$41K
Returns
0.0%of orders · Amazon United States median 2.1%

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 #88 within Allergy, Sinus & Asthma. It carries 15,030 reviews at 4.73 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
#88in Allergy, Sinus & Asthma
Average rating
4.73 starsAmazon United States average 4.42 stars
Average reviews
15,030per listing
Listings tracked
15

04 · Newcomers

1 of last year's 2 launches cleared the first-year sales bar.

2 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 78 months on average, so the names here are established.

Launched, last 12 months
2
Successful launches
1Amazon's first-year sales bar
Average brand age
78 months

Products

Top Diphenhydramine products & what they sell for

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

Sign in to see the products

The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone.

Competition

Competition: brands, sellers & click share

The top 5 products take 71% of clicks. A locked shelf that new listings rarely crack.

Brands

11 rising

Sellers

60

Top-5 brand share

84%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

11%

  • Brand 151%
  • Brand 211%
  • Brand 310%
  • Brand 47%
  • Brand 55%
  • Brand 64%
  • Open — no brand owns it (5 brands, 11%)

Demand

Diphenhydramine search demand

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

10K6KSpike '25Prime Day '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Search terms

Top Diphenhydramine search terms shoppers use

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

  • diphenhydramine249K/yr
  • diphenhydramine 25mg113K/yr
  • generic benadryl27K/yr
  • amazon basic care34K/yr
  • amazon health30K/yr
  • diphenhydramine hcl13K/yr
  • diphenhydramine hcl 25 mg8K/yr
  • benadryl generic7K/yr
  • amazon basics medicine10K/yr
  • difenhidramina8K/yr

Reviews and returns

What reviews say buyers love and hate about Diphenhydramine

We read the reviews and the return reasons for every product selling here.

26%of positive reviews mention “Value For Money”
20%of negative reviews mention “Sleep Quality”
<0.1%of orders come back, a rate Amazon rounds to zero
“Did not help me sleep”
A buyer, on “Sleep Quality”20% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

16 topics

NegativePositive

FAQ

Common Diphenhydramine questions

Answered from the same tracked data.