phenergan
Skip itA small market ($11K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Brand share
Good71%top-5 brand share — brands hold most of the demand
Growth
Good+29.6%90-day search growth — must beat 0% to launch
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Review moat
Okay2,329.13avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Avg price
Bad£7.30avg listing price — sweet spot $15–$100
Conversion
Bad1.3%search→purchase rate — share of searches ending in a sale
Price range
Bad£1.97–£16.99cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad£11K£11K/yr · 117K searches
According to Flapen's Amazon United Kingdom niche tracking, phenergan is a £11K/yr Amazon United Kingdom market (117K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 40/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
phenergan market data
- Units sold / yr
- 5K–6K
- avg 100–250/product
- Revenue / yr
- £37K–£44K
- units × avg price
- Conversion rate
- 1.3%
- Avg BSR
- #50
- Page quality
- 0%
- Prime
- 74%
- Sponsored
- 61%
- Out of stock
- 8.6%
- Avg brand age
- 49 months
- Avg seller age
- 172 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
16 rising
Sellers
118
Top-5 brand share
71%
Top 20: 100%
Top-5 click share
54%
Top 20: 96%
Open market
25%
- Generic32%
- Benadryl17%
- Amazon Basic Care8%
- Vividrin7%
- Galpharm6%
- Sentanase4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +29.6% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 2.7×
Top phenergan search terms
- chlorphenamine antihistamine tablets26K/yr
- chlorphenamine37K/yr
- chlorphenamine maleate15K/yr
- chlorphenamine maleate 4mg22K/yr
- chlorphenamine tablets4K/yr
- chlorphenamine 4mg5K/yr
- piriton chlorphenamine maleate3K/yr
- chlorpheniramine3K/yr
Top phenergan products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Hayfever & Allergy Antihistamine | Hayfever Dust Pets and Hives | 60 Tablets
Generic£13.074.9★65 rev
Benadryl Allergy One A Day 10 Mg Tablets - Effective and Long-Lasting Relief - 30 Count
Benadryl£6.764.6★8,541 rev
Amazon Basic Care Hayfever & Allergy Relief 10mg Tablets Cetirizine Hydrochloride 30 Tablets (Pack of 1) - Effective Relief from Hayfever Skin Allergies Dust Allergies and Pet Allergies
Amazon Basic Care£2.774.6★398 rev
Vividrin Allergy Relief Tablets - Cetirizine Antihistamine Tablets 10mg x 30 Tablets Effective Relief for Hayfever Sore & Itchy Eyes Pet and Skin Allergies Suitable for Adults and Kids 6+
Vividrin£4.174.8★38 rev
Galpharm Treathay Hayfever Relief Fexofenadine Hydrochloride Tablets 120mg Up to 24hrs Relief from Hayfever Sneezing Itchy Eyes and Runny Noses 30 Tablets
Galpharm£4.934.7★3,064 rev
Newest
by launch dateHayfever & Allergy Antihistamine | Hayfever Dust Pets and Hives | 60 Tablets
Generic£13.0765 rev
Hayfever & Allergy Antihistamine for Hayfever Dust Pets and Hives | 60 Tablets
Generic£12.6613 rev
Hayfever & Allergy Antihistamine for Hayfever Dust Pets and Hives | 60 Tablets
Generic£12.872 rev
Hayfever & Allergy Antihistamine Tablets | Relief for Hayfever Dust Pet Allergies & Hives | 60 x Tablets
Generic£12.478 rev
Vividrin Allergy Relief Tablets - Cetirizine Antihistamine Tablets 10mg x 30 Tablets Effective Relief for Hayfever Sore & Itchy Eyes Pet and Skin Allergies Suitable for Adults and Kids 6+
Vividrin£4.1738 rev
Trending
90-day click momentumHayfever & Allergy Antihistamine Tablets | Relief for Hayfever Dust Pet Allergies & Hives | 60 x Tablets
Generic£12.474.5★
Hayfever & Allergy Antihistamine for Hayfever Dust Pets and Hives | 60 Tablets
Generic£12.664.9★
Hayfever & Allergy Antihistamine for Hayfever Dust Pets and Hives | 60 Tablets
Generic£12.875.0★
180 Hayfever & Allergy Relief Cetirizine10mg Tablets Non-Drowsy Antihistamine Tablets | JJH Medical Hay Fever Tracker Bundle GSL
JJH Medical£8.024.9★
Vividrin Allergy Relief Tablets - Cetirizine Antihistamine Tablets 10mg x 30 Tablets Effective Relief for Hayfever Sore & Itchy Eyes Pet and Skin Allergies Suitable for Adults and Kids 6+
Vividrin£4.174.8★
What buyers say about phenergan
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent value for money”
“Great for hayfever”
“Ive found them to be reliable”
“Great allergy relief, very effective”
“As described”
“Works well”
“The once-daily dosing is convenient”
“Easy to swallow”
“These tablets were great at stopping all of my usual symptoms”
“Ease of use”
What buyers complain about
“Didn't work”
“Itching”
“Doesn't manage my hay fever completely”
“expensive”
“leave me feeling incredibly unwell”
“it's much more costly to be yamming multiple pills per day. on doctors advice I can take 3x 120mg per day.”
“it did not do much for the stuffiness in my nose”
“Never made me sleepy”
“It doesn't state age limit on box”
“Rubbish product”
Common questions
- Is phenergan profitable to sell on Amazon United Kingdom?
- The niche generates £11K/yr across 23 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is +29.6%. Flapen's verdict: Skip it (40/100).
- How competitive is the phenergan niche?
- 16 brands and 118 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 71% of demand.
- What do buyers complain about in phenergan?
- Top complaints mined from reviews: Functionality-Overall, Allergies, Fever Relief. The return rate is 0.0%.
- When does demand for phenergan peak?
- Demand peaks in Sep–Oct; the busiest month runs 2.7× the quietest.
- What does it cost to enter the phenergan niche?
- Listings span £1.97–£16.99; the average listing price is £7.30 (sweet spot $15–$100). The average incumbent carries 2,329 reviews — the moat a new listing must climb.