---
title: "Acetaminophen 650mg Extended Release — $648K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/acetaminophen-650mg-extended-release"
last_updated: "2026-08-09T03:44:12.909Z"
locale: en
meta:
description: "Niche score 44/100 · $648K/yr market · 228K searches/yr · $15.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · $648K/yr market · 228K searches/yr · $15.54 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Acetaminophen 650mg Extended Release — $648K/yr Amazon US Niche (2026) - Flapen"
---
# **acetaminophen 650mg extended release**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 66Growth 32Conversion 99Competition 7Returns 100Price range 52Avg price 76Brand share 0Review moat 24Quality gap 13
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****18.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$15.54**
avg listing price — sweet spot $15–$100
**Market size**
**Good****$648K**
$648K/yr · 228K searches
**Price range**
**Good****$7.14–$23.49**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+5.5%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****5,721.43**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.8★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****92%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, acetaminophen 650mg extended release is a $648K/yr Amazon United States market (228K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 44/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **acetaminophen 650mg extended release market data**
- **Units sold / yr**
- **40K–50K**
- avg 5,000–6,000/product
- **Revenue / yr**
- **$622K–$777K**
- units × avg price
- **Conversion rate**
- **18.3%**
- **Avg BSR**
- **#72**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **90 months**
- **Avg seller age**
- **156 days**
## **Competition & brand share**
The top 5 products capture 92% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▼falling
**Sellers**
**52**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**92%**
Top 20: 100%
**Open market**
**0%**
- Amazon Basic Care70% - TIME-CAP LABS, INC.13% - HealthA2Z11% - MEMBER´S MARK6% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +5.5% search growth over the last 90 days.
5K3KPrime Day '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/health-household/acetaminophen-650mg-extended-release/trend)
## **Top acetaminophen 650mg extended release search terms**
- **acetaminophen 650mg extended release**126K/yr+2.7%21.7% conv. - **acetaminophen 650mg extra strength**12K/yr+145.3%18.4% conv. - **acetaminophen arthritis**13K/yr+7.5%10.9% conv. - **650 mg acetaminophen arthritis pain 650 mg 8 hour**10K/yr+35.0%16.2% conv. - **arthritis strength acetaminophen 650 mg**9K/yr+9.5%16.4% conv. - **acetaminophen 650 mg**20K/yr-57.1%12.7% conv. - **8 hour arthritis pain relief acetaminophen 650 mg**8K/yr+28.9%16.0% conv. - **8 hr arthritis pain relief 650 mg acetaminophen**8K/yr-1.6%15.3% conv. - **acetaminophen 650**10K/yr+1.2%14.7% conv. - **acetaminophen 650mg**6K/yr+25.2%11.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/acetaminophen-650mg-extended-release/search-terms)
## **Top acetaminophen 650mg extended release 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.
0%15%$97K30%$194K45%$291K60%$389K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Amazon Basic Care Acetaminophen Extended-Release Tablets 650 mg Pain Reliever Fever Reducer Arthritis Pain Headache Backache Menstrual Pain 400 Count**Amazon Basic Care**$19.98**4.8★25,357 rev](https://www.amazon.com/dp/B079HXJGGT) [2**Amazon Basic Care Acetaminophen Extended-Release Tablets 650 mg Pain Reliever Fever Reducer 8 Hour Relief 100 Count**Amazon Basic Care**$7.14**4.8★3,652 rev](https://www.amazon.com/dp/B09HM6B446) [3**TIME-Cap Labs 400 Caplets Extended Release Acetaminophen 650mg - Pain Reliever & Fever Reducer for Adults Helps with Headaches Backaches Muscle Pain Toothaches Arthritis & Menstrual Cramps**TIME-CAP LABS, INC.**$20.32**4.8★3,684 rev](https://www.amazon.com/dp/B09LTJC8L2) [4**HealthA2Z Pain Relief Extended Release | Acetaminophen 650mg | 8 Hours | Arthiritis Pain | Pain Reliever - Fever Reducer | Contains no Aspirin (100 Count)**HealthA2Z**$8.43**4.8★2,616 rev](https://www.amazon.com/dp/B0D33WTPFN) [5**Compare to Tylenol Arthritis Pain Active Ingredient. - Members Mark - Arthritis Pain Reliever Extended Release Acetaminophen 650 mg 400 CapletsQ**MEMBER´S MARK**$23.49**4.8★1,205 rev](https://www.amazon.com/dp/B00BISO0LS)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Amazon Basic Care Acetaminophen Extended-Release Tablets 650 mg Pain Reliever Fever Reducer 8 Hour Relief 100 Count**Amazon Basic Care**$7.14**3,652 rev1y ago](https://www.amazon.com/dp/B09HM6B446) [**HealthA2Z Pain Relief Extended Release | Acetaminophen 650mg | 8 Hours | Arthiritis Pain | Pain Reliever - Fever Reducer | Contains no Aspirin (100 Count)**HealthA2Z**$8.43**2,616 rev2y ago](https://www.amazon.com/dp/B0D33WTPFN) [**HealthA2Z Acetaminophen 650mg ER 8-Hour Pain & Fever Dye Free 250 Ct**HealthA2Z**$15.51**2,616 rev2y ago](https://www.amazon.com/dp/B0D33V5M5H) [**TIME-Cap Labs 225 Caplets Extended Release Acetaminophen 650mg - Pain Reliever & Fever Reducer for Adults Helps with Headaches Backaches Muscle Pain Toothaches & Menstrual Cramps**TIME-CAP LABS, INC.**$13.93**920 rev2y ago](https://www.amazon.com/dp/B0CCVTKPML) [**TIME-Cap Labs 400 Caplets Extended Release Acetaminophen 650mg - Pain Reliever & Fever Reducer for Adults Helps with Headaches Backaches Muscle Pain Toothaches Arthritis & Menstrual Cramps**TIME-CAP LABS, INC.**$20.32**3,684 rev4y ago](https://www.amazon.com/dp/B09LTJC8L2)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**TIME-Cap Labs 400 Caplets Extended Release Acetaminophen 650mg - Pain Reliever & Fever Reducer for Adults Helps with Headaches Backaches Muscle Pain Toothaches Arthritis & Menstrual Cramps**TIME-CAP LABS, INC.**$20.32**4.8★**▲ 23%**](https://www.amazon.com/dp/B09LTJC8L2) [**Amazon Basic Care Acetaminophen Extended-Release Tablets 650 mg Pain Reliever Fever Reducer 8 Hour Relief 100 Count**Amazon Basic Care**$7.14**4.8★**▲ 10%**](https://www.amazon.com/dp/B09HM6B446) [**TIME-Cap Labs 225 Caplets Extended Release Acetaminophen 650mg - Pain Reliever & Fever Reducer for Adults Helps with Headaches Backaches Muscle Pain Toothaches & Menstrual Cramps**TIME-CAP LABS, INC.**$13.93**4.8★**— 1%**](https://www.amazon.com/dp/B0CCVTKPML) [**Amazon Basic Care Acetaminophen Extended-Release Tablets 650 mg Pain Reliever Fever Reducer Arthritis Pain Headache Backache Menstrual Pain 400 Count**Amazon Basic Care**$19.98**4.8★**— 1%**](https://www.amazon.com/dp/B079HXJGGT) [**HealthA2Z Pain Relief Extended Release | Acetaminophen 650mg | 8 Hours | Arthiritis Pain | Pain Reliever - Fever Reducer | Contains no Aspirin (100 Count)**HealthA2Z**$8.43**4.8★**— 4%**](https://www.amazon.com/dp/B0D33WTPFN)
**~~View all trending →~~**
## **What buyers say about acetaminophen 650mg extended release**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**35%
*“Very affordable”*
**Quality-Overall**15%
*“Just as good as name brand”*
**Advertised Vs Actual Product**12%
*“As advertised”*
**Efficiency**7%
*“Does the job”*
**Joint Pain**5%
*“Have used this for knee pain etc for years”*
**Dosage**5%
*“Great medication”*
**Ease Of Use**3%
*“Useful”*
**Strength**2%
*“Strong”*
**Fever Relief**2%
*“It is that reliable compound we turn to when our body decides that a headache or a mild fever is going to ruin the day”*
**Ingredients-Overall**1%
*“This acetaminophen is as effective as any brand pm the market”*
### **What buyers complain about **
**Value For Money**15%
*“cheaper”*
**Pain Relief-Overall**13%
*“And pain”*
**Functionality-Overall**13%
*“Didnt work for me”*
**Strength**8%
*“Not as strong as the Tylenol brand”*
**Ingredients-Overall**7%
*“The acetaminophen I received had expired”*
**Dosage**7%
*“The remaining 325 mg is slowly released over the next 7 or so hours which is too little per hour to help with anything other than very minor pain”*
**Adhesion/Stickiness**3%
*“Sticks to your throat”*
**Color Fading/Discoloration**3%
*“One was moldy and discolored”*
**Ease Of Use**2%
*“Cannot use”*
**Instructions/User Manual/Troubleshooting**1%
*“And the driver did not follow the instructions he was given”*
## **Common questions**
- **Is acetaminophen 650mg extended release profitable to sell on Amazon United States?**
- The niche generates $648K/yr across 7 tracked products. 90-day search growth is +5.5%. Flapen's verdict: Skip it (44/100).
- **How competitive is the acetaminophen 650mg extended release niche?**
- 4 brands and 52 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in acetaminophen 650mg extended release?**
- Top complaints mined from reviews: Value For Money, Pain Relief-Overall, Functionality-Overall. The return rate is 0.0%.
- **When does demand for acetaminophen 650mg extended release peak?**
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- **What does it cost to enter the acetaminophen 650mg extended release niche?**
- Listings span $7.14–$23.49; the average listing price is $15.54 (sweet spot $15–$100). The average incumbent carries 5,721 reviews — the moat a new listing must climb.
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