Diphenhydramine Liquid
FailThe top 5 products take 83% of clicks, so Diphenhydramine Liquid is a Fail.
- Flapen Score
- 36 / 100Ranks 13,545 of 14,768 Health & Household niches · −13 vs the category median of 4936
- Market size
- $72K/yr75K searches / yr
- 90-day growth
- -1.8%search demand this quarter
- Competition
- 83%top-5 click share · 7 brands · 66 sellers
Flapen Score
Diphenhydramine Liquid against its category
The dotted line is the Health & Household average. Past it, Diphenhydramine Liquid is stronger. Inside it, weaker.
Market
The Diphenhydramine Liquid market on Amazon at a glance
Shoppers on Amazon United States searched for Diphenhydramine Liquid 75K times last year and spent an estimated $72K. The top 5 brands take 94% of clicks. Demand peaks in Mar–Apr–May–Jun. Flapen scores it 36 out of 100, a Fail.
01 · Demand
An estimated 9.6% of those searches ended in a purchase.
Shoppers searched for this 75K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 9.6% of those searches ended in a purchase. Searches in the last 90 days moved -1.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $72K a year.
- Searches, last 12 months
- 75K
- Growth, 90 days vs prior 90
- -1.8%
- Conversion, latest week
- 9.6%
- Market size, estimated
- $72Ka year
- Peak month
- March21.9× the quietest month
- Top search term
- diphenhydramine liquid23K searches a year
02 · Price
A sale here is worth $9.97.
Listings sell for $9.97 on average, from $4.26 to $19.13. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 1,000 to 1,250 of them. At $9.97 that is $10K to $12K a year per listing.
- Average price
- $9.97under the $15 to $100 sweet spot
- Price range
- $4.26–$19.13
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 13K–15K
- Units per listing a year
- 1,000–1,250
- Revenue per listing a year
- $10K–$12K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
60% 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 #110 within Allergy, Sinus & Asthma. It carries 3,575 reviews at 4.56 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 60%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #110in Allergy, Sinus & Asthma
- Average rating
- 4.56 starsAmazon United States average 4.42 stars
- Average reviews
- 3,575per listing
- Listings tracked
- 10
04 · Newcomers
1 of last year's 1 launches cleared the first-year sales bar.
1 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 62 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 62 months
Products
Top Diphenhydramine Liquid products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 11, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Amazon Basic Care Nighttime Sleep-Aid Liquid for Adults Helps Fall Asleep Fast Diphenhydramine HCl 50 mg Mixed Berry Flavor 12 fl oz (Pack of 1)
- Price
- $5.64
- Rating
- 4.5/5
- Reviews
- 7,621
- Age
- 6y ago

Amazon Basic Care Childrens Allergy Relief Oral Solution Diphenhydramine HCl Antihistamine Cherry Flavor 4 fl oz (Pack of 1)
- Price
- $4.26
- Rating
- 4.8/5
- Reviews
- 1,966
- Age
- 4y ago

GeriCare Geri-Dryl Diphenhydramine HCI Solution - Antihistamine Liquid Multi-Symptom Allergy Relief Formula - Relieves Sneezing Runny Nose Watery Itchy Eyes & Throat 16 FL OZ (Pack of 1) Red
- Price
- $9.90
- Rating
- 4.5/5
- Reviews
- 184
- Age
- 2y ago

ZzzQuil Sleep Aid Nighttime Sleep Aid Liquid 50 mg Diphenhydramine HCl Fall Asleep Fast Non-Habit Forming Warming Berry Flavor 12 FL OZ (Pack of 2)
- Price
- $15.40
- Rating
- 4.7/5
- Reviews
- 9,828
- Age
- 14y ago

Puregen Labs Allergy Relief Oral Solution Diphenhydramine HCl 12.5mg/5 mL Antihistamine Cherry Flavor 16 Ounces
- Price
- $11.99
- Rating
- 4.5/5
- Reviews
- 445
- Age
- 3y ago
Trending
estimated 90-day click momentum
ZzzQuil Liquid Sleep Aid Diphenhydramine 50mg HCI Free & Clear Free of Alcohol and Artificial Dyes Nighttime Sleep Aid Liquid Non-Habit Forming Strawberry Flavored 2 Pack 24 FL OZ
- Price
- $19.13
- Rating
- 4.4/5
- Reviews
- 290
- Age
- 4mo ago

ZzzQuil Liquid Sleep Aid Diphenhydramine 50mg HCl Nighttime Sleep Aid Liquid Sleep Aids for Adults Warming Berry Flavored 12 FL OZ
- Price
- $9.16
- Rating
- 4.6/5
- Reviews
- 10,693
- Age
- 14y ago

Puregen Labs Allergy Relief Oral Solution Diphenhydramine HCl 12.5mg/5 mL Antihistamine Cherry Flavor 16 Ounces
- Price
- $11.99
- Rating
- 4.5/5
- Reviews
- 445
- Age
- 3y ago

Nighttime Sleep-Aid Liquid for Adults AP Safe
- Price
- $6.86
- Rating
- 4.3/5
- Reviews
- 79
- Age
- 2y ago

Benadryl Allergy Medicine Liquid Diphenhydramine HCl Antihistamines for Adults Alcohol-Free Hay Fever Allergy Relief for Sneezing Runny Nose Itchy & Watery Eyes Wild Cherry 4 fl oz
- Price
- $8.13
- Rating
- 4.8/5
- Reviews
- 1,282
- Age
- 1y ago
Newest
by launch date
ZzzQuil Liquid Sleep Aid Diphenhydramine 50mg HCI Free & Clear Free of Alcohol and Artificial Dyes Nighttime Sleep Aid Liquid Non-Habit Forming Strawberry Flavored 2 Pack 24 FL OZ
- Price
- $19.13
- Rating
- 4.4/5
- Reviews
- 290
- Age
- 4mo ago

Benadryl Allergy Medicine Liquid Diphenhydramine HCl Antihistamines for Adults Alcohol-Free Hay Fever Allergy Relief for Sneezing Runny Nose Itchy & Watery Eyes Wild Cherry 4 fl oz
- Price
- $8.13
- Rating
- 4.8/5
- Reviews
- 1,282
- Age
- 1y ago

GeriCare Geri-Dryl Diphenhydramine HCI Solution - Antihistamine Liquid Multi-Symptom Allergy Relief Formula - Relieves Sneezing Runny Nose Watery Itchy Eyes & Throat 16 FL OZ (Pack of 1) Red
- Price
- $9.90
- Rating
- 4.5/5
- Reviews
- 184
- Age
- 2y ago

Nighttime Sleep-Aid Liquid for Adults AP Safe
- Price
- $6.86
- Rating
- 4.3/5
- Reviews
- 79
- Age
- 2y ago

Puregen Labs Allergy Relief Oral Solution Diphenhydramine HCl 12.5mg/5 mL Antihistamine Cherry Flavor 16 Ounces
- Price
- $11.99
- Rating
- 4.5/5
- Reviews
- 445
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 83% of clicks. A locked shelf that new listings rarely crack.
Brands
7 falling
Sellers
66
Est. top-5 brand share
94%
Top 20: 100%
Est. top-5 click share
83%
Top 20: 100%
Open market
3%
- Amazon Basic Care61%
- ZzzQuil15%
- GeriCare8%
- P Puregen Labs6%
- APSAFE3%
- Benadryl3%
- Open — no brand owns it (1 brand, 3%)
Demand
Diphenhydramine Liquid search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Mar, Apr, May, Jun · busiest ÷ quietest = 21.9×
Search terms
Top Diphenhydramine Liquid search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- diphenhydramine liquid23K/yr
- liquid sleep aid13K/yr
- sleep aid liquid13K/yr
- liquid sleep aid for adults13K/yr
- liquid diphenhydramine7K/yr
- sleep liquid4K/yr
- nighttime sleep aid liquid2K/yr
Reviews and returns
What reviews say buyers love and hate about Diphenhydramine Liquid
We read the reviews and the return reasons for every product selling here.
“No sleep”
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
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Diphenhydramine Liquid questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









