diphenhydramine 50mg
Skip itA deep review moat (11,667 avg reviews) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 6% kills the launch gate
Conversion
Incredible16.8%search→purchase rate — share of searches ending in a sale
Avg price
Good$13.28avg listing price — sweet spot $15–$100
Price range
Good$4.12–$29.46cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay81%top-5 brand share — brands hold most of the demand
Market size
Okay$194K$194K/yr · 87K searches
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-6.7%90-day search growth — must beat 0% to launch
Review moat
Bad11,667.13avg incumbent reviews — the moat a new listing must climb
Competition
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.Brands
11 falling
Sellers
40
Top-5 brand share
81%
Open market
13%
- HealthA2Z28%
- SDA LABORATORIES20%
- WELMATE14%
- RIGHT REMEDIES10%
- Amazon Basic Care9%
- Generic7%
- Open — no brand owns it (5 brands, 13%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
HealthA2Z Sleep Aid Diphenhydramine Softgels 50mg Supports Deeper Restful Sleeping (250 Counts)
HealthA2Z$10.074.5★22,293 rev
WELMATE Allergy Relief - Diphenhydramine 50 mg - 1000 Count Capsules - Antihistamine - Allergy & Cold Symptoms - Sneezing Runny Nose Itchy Eyes & Throat
WELMATE$24.634.7★677 rev
SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Fast-Acting Indoor & Outdoor Antihistamine Symptom Control 1000 Count (1 Bottle)
SDA LABORATORIES$29.464.8★944 rev
RIGHT REMEDIES Nighttime Sleep Aid Softgels (275 softgels) Diphenhydramine HCI 50 mg Fall Asleep Fast Supports Deeper Restful Sleep
RIGHT REMEDIES$11.094.4★1,292 rev
HealthA2Z Sleep Aid Diphenhydramine Softgels 50mg Supports Deeper Restful Sleeping (100 Counts)
HealthA2Z$6.164.5★22,293 rev
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
P Puregen Labs$24.765 rev
SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Antihistamine Capsules Fast-Acting Formula for Sneezing Runny Nose & Itchy Eyes 100 Count (1 Pack)
SDA LABORATORIES$6.3026 rev
A+Health Dye-Free Extra Strength Allergy Relief Medicine Diphenhydramine HCl 50mg Softgels Antihistamine 100 Count
A+Health$8.88416 rev
WELMATE Allergy Relief - Diphenhydramine 50 mg - 1000 Count Capsules - Antihistamine - Allergy & Cold Symptoms - Sneezing Runny Nose Itchy Eyes & Throat
WELMATE$24.63677 rev
SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Antihistamine Capsules Fast-Acting Formula for Sneezing Runny Nose & Itchy Eyes 100 Count (2 Pack)
SDA LABORATORIES$10.18102 rev
Trending
90-day click momentumPuregen Labs Diphenhydramine HCl 50 mg Capsules 1000 Count Antihistamine I Allergy & Cold Symptoms Relief - Sneezing Runny Nose Itchy Eyes & Throat
P Puregen Labs$24.765.0★
RIGHT REMEDIES Nighttime Sleep Aid Softgels (275 softgels) Diphenhydramine HCI 50 mg Fall Asleep Fast Supports Deeper Restful Sleep
RIGHT REMEDIES$11.094.4★
SDA LABORATORIES Diphenhydramine 50mg Allergy Relief Antihistamine Capsules Fast-Acting Formula for Sneezing Runny Nose & Itchy Eyes 100 Count (1 Pack)
SDA LABORATORIES$6.304.5★
MedPlus Allergy Relief Medicine Diphenhydramine HCl 25 mg 1000 Tablets Antihistamine Relief for Indoor & Outdoor Allergies Made in USA
Generic$10.334.8★
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
Amazon Basic Care$4.124.8★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -6.7% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Help with sleep”
“much less expensive”
“Helps with allergies”
“the tablets have been consistent in quality”
“Does work”
“As advertised”
“The 100-count bottle is great value”
“I swallowed them fine”
“nice effects”
“it relieved my sinuses”
What buyers complain about
“No sleep”
“Didn't work for me”
“sometimes I get itchy”
“Need stronger dosage”
“Not as strong as needed”
“Can't use”
“Warning: Side effects”
“for some reason they are soft and mushy instead of hard like usual and they have a medicine taste to them makes me wonder if some of them broke open and got wet and that's why they're so soft and taste the way they do”
“cheaper”
“The tablets are small”