Is methenamine profitable to sell on Amazon United States?

The niche generates $595K/yr across 7 tracked products. 90-day search growth is -4.8%. Flapen's verdict: Skip it (42/100).

How competitive is the methenamine niche?

3 brands and 23 sellers compete. The top 5 products take 94% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in methenamine?

Top complaints mined from reviews: Pain Relief-Overall, Color, Functionality-Overall. The return rate is 0.1%.

What does it cost to enter the methenamine niche?

Listings span $7.34–$19.38; the average listing price is $12.68 (sweet spot $15–$100). The average incumbent carries 3,722 reviews — the moat a new listing must climb.

Methenamine

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Incredible18.9%

search→purchase rate — share of searches ending in a sale

Market size

Good$595K

$595K/yr · 249K searches

Avg price

Good$12.68

avg listing price — sweet spot $15–$100

Price range

Okay$7.34–$19.38

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Okay3,722.43

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-4.8%

90-day search growth — must beat 0% to launch

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad94%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Is methenamine profitable on Amazon?

According to Flapen's Amazon United States niche tracking, methenamine is a $595K/yr Amazon United States market (249K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 42/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

methenamine market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 50K–60K; avg 6,000–8,000/product
Revenue / yr: $634K–$761K; units × avg price
Conversion rate: 18.9%
Avg BSR: #94
Page quality: 0%
Prime: 100%
Sponsored: 57%
Out of stock: 0.0%
Avg brand age: 68 months
Avg seller age: 155 days

Competition: brands, sellers & click share

The top 5 products capture 94% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 rising

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

94%

Top 20: 100%

Open market

Cystex79%
AZO18%
DSE Healthcare Solutions3%

Top methenamine search terms shoppers use

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

cystex101K/yr -13.3%19.6% conv.
cystex uti pain relief max strength 48 ct33K/yr -7.6%25.0% conv.
methenamine25K/yr +3.9%2.4% conv.
azo urinary tract defense28K/yr -13.9%12.4% conv.
cystex uti9K/yr +92.4%21.4% conv.
methenamine tablets for uti9K/yr +48.4%3.5% conv.
azo urinary tract defense antibacterial protection5K/yr +37.0%16.7% conv.
methenamine hippurate7K/yr -4.0%2.4% conv.
azo antibacterial4K/yr +8.4%14.3% conv.
cystex maximum strength9K/yr -46.6%22.0% conv.

All search terms

Top methenamine products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 7 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Cystex Dual-Action UTI Pain Relief Tablets - Fast-Acting Urinary Pain Relief for Burning Urgency & Discomfort - Methenamine & Sodium Salicylate Formula - Non-Staining UTI Support - 48 Count

Cystex$9.744.7★5,988 rev

Azo Urinary Tract Defense Antibacterial Protection Helps Control a Uti Until You Can See a Doctor from the No. 1 Most Trusted Urinary Health Brand 24 Count

AZO$8.424.7★14,407 rev

Cystex Cranberry Urinary Health Supplement Liquid - D-Mannose Prebiotic & Vitamin C for Urinary Tract & Bladder Support - Daily Urinary Wellness for Women & Men Sugar-Free - 7.6 fl oz (2 Pack)

Cystex$16.644.6★4,112 rev

Cystex Maximum-Strength UTI Pain Relief Tablets - 99.5 mg Phenazopyridine HCl for Burning Urgency & Bladder Discomfort Relief - Fast-Acting Non-Staining Urinary Pain Relief Tablets - 24 Count

Cystex$7.344.5★375 rev

Cystex Cranberry Urinary Health Supplement - Cranberry Probiotics Prebiotics & Vitamin C for Urinary Tract & Vaginal Health Support - pH & Yeast Balance - Sugar-Free Daily Health Uses - 75 Caplets

Cystex$9.904.7★751 rev

Newest

by launch date

Cystex Maximum-Strength UTI Pain Relief Tablets - 99.5 mg Phenazopyridine HCl for Burning Urgency & Bladder Discomfort Relief - Fast-Acting Non-Staining Urinary Pain Relief Tablets - 24 Count

Cystex$7.34375 rev

2y ago

Cystex 3-in-1 Urinary Tract Probiotic for Women - Prebiotic Probiotic & Cranberry Supplement for UTI & Yeast Infection Support - Vaginal pH Balance & Flora Support - Urinary Health - 30 Capsules

Cystex$19.38320 rev

2y ago

Cystex Cranberry Urinary Health Supplement - Cranberry Probiotics Prebiotics & Vitamin C for Urinary Tract & Vaginal Health Support - pH & Yeast Balance - Sugar-Free Daily Health Uses - 75 Caplets

Cystex$9.90751 rev

3y ago

Cystex Dual-Action UTI Pain Relief Tablets - Fast-Acting Urinary Pain Relief for Burning Urgency & Discomfort - Methenamine & Sodium Salicylate Formula - Non-Staining UTI Support - 48 Count

Cystex$9.745,988 rev

4y ago

Cystex Cranberry Urinary Health Supplement Liquid - D-Mannose Prebiotic & Vitamin C for Urinary Tract & Bladder Support - Daily Urinary Wellness for Women & Men Sugar-Free - 7.6 fl oz (2 Pack)

Cystex$16.644,112 rev

6y ago

What reviews say buyers love and hate about methenamine

What buyers praise and complain about, mined from review topics.

What buyers love

Efficiency18%

“Hopefully effective”

Quality-Overall15%

“Very good reviews”

Value For Money10%

“The Amazon price is fantastic”

Urinary Bladder Health8%

“Excellent alternative for UTI”

Regulates Digestion7%

“It works wonders to help prevent bladder infections”

Advertised Vs Actual Product5%

“Exactly as pictured, described and expected”

Ease Of Chewing/Swallowing4%

“Easy to swallow”

Taste-Overall4%

“This cranberry pills are amazing”

Joint Pain4%

“Bladder pain, relief”

Ease Of Use3%

“Its reliable, effective, and very easy to use”

What buyers complain about

Pain Relief-Overall13%

“The pain management doesn't really work”

Color13%

“Also, not a fan of the red dye”

Functionality-Overall12%

“Does not work”

Ease Of Chewing/Swallowing7%

“These aren't chewable so don't try”

Allergies5%

“I am highly allergic to NSAIDs”

Color Fading/Discoloration5%

“doesn't change the color of my urine unlike similar products”

Heart Health4%

“made my heart rate go up”

Visibility4%

“it was undetectable to the human eye at my doctor appointment”

Dosage4%

“They dont make me sick like my prescription ones did couldnt take them”

Quality-Overall4%

“Mediocre”

Top return reasons

Value For Money100%

Common methenamine questions

Is methenamine profitable to sell on Amazon United States?: The niche generates $595K/yr across 7 tracked products. 90-day search growth is -4.8%. Flapen's verdict: Skip it (42/100).
How competitive is the methenamine niche?: 3 brands and 23 sellers compete. The top 5 products take 94% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in methenamine?: Top complaints mined from reviews: Pain Relief-Overall, Color, Functionality-Overall. The return rate is 0.1%.
What does it cost to enter the methenamine niche?: Listings span $7.34–$19.38; the average listing price is $12.68 (sweet spot $15–$100). The average incumbent carries 3,722 reviews — the moat a new listing must climb.