Diphenhydramine 50mg
FailThe average product has 11,667 reviews to catch up to, so Diphenhydramine 50mg is a Fail.
- Flapen Score
- 48 / 100Ranks 7,720 of 14,768 Health & Household niches · −1 vs the category median of 4948
- Market size
- $194K/yr87K searches / yr
- 90-day growth
- -6.7%search demand this quarter
- Competition
- 63%top-5 click share · 11 brands · 40 sellers
Flapen Score
Diphenhydramine 50mg against its category
The dotted line is the Health & Household average. Past it, Diphenhydramine 50mg is stronger. Inside it, weaker.
Market
The Diphenhydramine 50mg market on Amazon at a glance
Shoppers on Amazon United States searched for Diphenhydramine 50mg 87K times last year and spent an estimated $194K. The top 5 brands take 81% of clicks. Flapen scores it 48 out of 100, a Fail.
01 · Demand
An estimated 16.8% of those searches ended in a purchase.
Shoppers searched for this 87K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 16.8% of those searches ended in a purchase. Searches in the last 90 days moved -6.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $194K a year.
- Searches, last 12 months
- 87K
- Growth, 90 days vs prior 90
- -6.7%
- Conversion, latest week
- 16.8%
- Market size, estimated
- $194Ka year
- Peak month
- January1.5× the quietest month
- Top search term
- diphenhydramine 50mg83K searches a year
02 · Price
A sale here is worth $13.28.
Listings sell for $13.28 on average, from $4.12 to $29.46. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 750 to 1,000 of them. At $13.28 that is $10K to $13K a year per listing.
- Average price
- $13.28under the $15 to $100 sweet spot
- Price range
- $4.12–$29.46
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 13K–15K
- Units per listing a year
- 750–1,000
- Revenue per listing a year
- $10K–$13K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
81% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 6.0% of listings are out of stock. The average listing ranks #134 within Allergy, Sinus & Asthma. It carries 11,667 reviews at 4.64 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 81%
- Prime listings
- 94%
- Out of stock, average day
- 6.0%
- Average rank
- #134in Allergy, Sinus & Asthma
- Average rating
- 4.64 starsAmazon United States average 4.42 stars
- Average reviews
- 11,667per listing
- Listings tracked
- 16
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 93 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
- 93 months
Products
Top Diphenhydramine 50mg 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
HealthA2Z Sleep Aid Diphenhydramine Softgels 50mg Supports Deeper Restful Sleeping (250 Counts)
- Price
- $10.07
- Rating
- 4.5/5
- Reviews
- 22,293
- Age
- 6y ago

WELMATE Allergy Relief - Diphenhydramine 50 mg - 1000 Count Capsules - Antihistamine - Allergy & Cold Symptoms - Sneezing Runny Nose Itchy Eyes & Throat
- Price
- $24.63
- Rating
- 4.7/5
- Reviews
- 677
- Age
- 2y ago

SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Fast-Acting Indoor & Outdoor Antihistamine Symptom Control 1000 Count (1 Bottle)
- Price
- $29.46
- Rating
- 4.8/5
- Reviews
- 944
- Age
- 16y ago

RIGHT REMEDIES Nighttime Sleep Aid Softgels (275 softgels) Diphenhydramine HCI 50 mg Fall Asleep Fast Supports Deeper Restful Sleep
- Price
- $11.09
- Rating
- 4.4/5
- Reviews
- 1,292
- Age
- 3y ago

HealthA2Z Sleep Aid Diphenhydramine Softgels 50mg Supports Deeper Restful Sleeping (100 Counts)
- Price
- $6.16
- Rating
- 4.5/5
- Reviews
- 22,293
- Age
- 4y ago
Trending
estimated 90-day click momentum
Puregen Labs Diphenhydramine HCl 50 mg Capsules 1000 Count Antihistamine I Allergy & Cold Symptoms Relief - Sneezing Runny Nose Itchy Eyes & Throat
- Price
- $24.76
- Rating
- 5.0/5
- Reviews
- 5
- Age
- 2mo ago

RIGHT REMEDIES Nighttime Sleep Aid Softgels (275 softgels) Diphenhydramine HCI 50 mg Fall Asleep Fast Supports Deeper Restful Sleep
- Price
- $11.09
- Rating
- 4.4/5
- Reviews
- 1,292
- Age
- 3y ago

SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Antihistamine Capsules Fast-Acting Formula for Sneezing Runny Nose & Itchy Eyes 100 Count (1 Pack)
- Price
- $6.30
- Rating
- 4.5/5
- Reviews
- 26
- Age
- 9mo ago

MedPlus Allergy Relief Medicine Diphenhydramine HCl 25 mg 1000 Tablets Antihistamine Relief for Indoor & Outdoor Allergies Made in USA
- Price
- $10.33
- Rating
- 4.8/5
- Reviews
- 1,330
- Age
- 3y ago

Amazon Basic Care Allergy Relief Diphenhydramine HCl 25 mg Antihistamine Tablets for Symptoms Due to Hay Fever and Upper Respiratory Allergies Mini-Tabs 100 Count
- Price
- $4.12
- Rating
- 4.8/5
- Reviews
- 54,786
- Age
- 7y ago
Newest
by launch date
Puregen Labs Diphenhydramine HCl 50 mg Capsules 1000 Count Antihistamine I Allergy & Cold Symptoms Relief - Sneezing Runny Nose Itchy Eyes & Throat
- Price
- $24.76
- Rating
- 5.0/5
- Reviews
- 5
- Age
- 2mo ago

SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Antihistamine Capsules Fast-Acting Formula for Sneezing Runny Nose & Itchy Eyes 100 Count (1 Pack)
- Price
- $6.30
- Rating
- 4.5/5
- Reviews
- 26
- Age
- 9mo ago

A+Health Dye-Free Extra Strength Allergy Relief Medicine Diphenhydramine HCl 50mg Softgels Antihistamine 100 Count
- Price
- $8.88
- Rating
- 4.7/5
- Reviews
- 416
- Age
- 2y ago

WELMATE Allergy Relief - Diphenhydramine 50 mg - 1000 Count Capsules - Antihistamine - Allergy & Cold Symptoms - Sneezing Runny Nose Itchy Eyes & Throat
- Price
- $24.63
- Rating
- 4.7/5
- Reviews
- 677
- Age
- 2y ago

SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Antihistamine Capsules Fast-Acting Formula for Sneezing Runny Nose & Itchy Eyes 100 Count (2 Pack)
- Price
- $10.18
- Rating
- 4.6/5
- Reviews
- 102
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 63% of clicks. Leaders hold, but buyers still shop past them.
Brands
11 falling
Sellers
40
Est. top-5 brand share
81%
Top 20: 100%
Est. top-5 click share
63%
Top 20: 100%
Open market
13%
- HealthA2Z28%
- SDA LABORATORIES20%
- WELMATE14%
- RIGHT REMEDIES10%
- Amazon Basic Care9%
- Generic7%
- Open — no brand owns it (5 brands, 13%)
Demand
Diphenhydramine 50mg search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Reviews and returns
What reviews say buyers love and hate about Diphenhydramine 50mg
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 50mg 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









