does it expired? i have one from lot: 22621A that does not have an expiration date and was purchase a few years ago.

As a general rule it expires 3 years from the date of manufacture, which is located at the base of the product, which for you is 2021. Therefore, your Plax will expire around 2024. This is what I found out on a Google search.

Did they discontinue Plax ? The price is crazy now .

The crazy price is only on Amazon. They did not discontinue it, but I don't buy it when price gougers are holding it hostage. Amazon needs to stop these exorbitant prices.

Does this remove existing plaque?

It softens recently developed plaque for easier removal when brushing. This is why you use it before brushing your teeth. It doesn’t help soften old plaque that has hardened into tartar

Does plax hurt or loosen dental crowns?

I’ve used Plax for many years. It does not hurt and never loosened any of my crowns. I’m not sure it assists with my plaque problem, I suspect my Sonicare does more for my plaque.

Listerine Plax Advanced Prebrushing Dental Rinse Soft Mint 24 Ounce

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Description

🦷 Elevate your oral care game—because your smile deserves the pre-brush advantage!

NO RINSE CONVENIENCE - Foams through your mouth and requires no rinsing after brushing, maximizing active ingredient benefits.
ECONOMICAL EFFICIENT - Just a small dose twice daily lasts up to 2 months—perfect for busy professionals.
LONG LASTING FRESHNESS - Soft mint flavor leaves your mouth feeling clean and refreshed without harsh aftertaste.
PRE BRUSHING POWER BOOST - Loosens and detaches plaque before you brush, making your routine more effective.
CLINICALLY PROVEN PLAQUE FIGHTER - Removes more plaque than brushing alone for a dentist-clean feel every day.

Listerine Plax Advanced PreBrushing Dental Rinse in Soft Mint is a clinically proven mouthwash designed to loosen and remove more plaque than brushing alone. Its unique pre-brushing formula foams to reach deep plaque buildup, enhancing your daily oral hygiene routine. With a pleasant soft mint flavor and no need to rinse after brushing, it offers a convenient, long-lasting solution for adults seeking superior plaque control and fresher breath.

Specifications

ASIN	B0012DVJM2
ASIN	B0012DVJM2
Age Range Description	Adults
Best Sellers Rank	#120,671 in Health ( See Top 100 in Health ) #933 in Mouthwashes
Brand	Plax
Customer Reviews	4.8 4.8 out of 5 stars (2,922)
Customer reviews	4.8 4.8 out of 5 stars (2,922)
Date First Available	10 August 2012
Is Discontinued By Manufacturer	Yes
Item model number	JJ-633
Manufacturer	Plax
Package Dimensions	24.41 x 9.65 x 4.9 cm; 453.59 g
Units	24.0 Ounce
Volume	24 Fluid Ounces
Weight	680 g

Reviews

P**.

Great mouthwash - before brushing, foaming and good taste (not harsh at all)

2.12.2025

S**T

Works great

22.01.2026

J**G

Efficace

Cela fait pratiquement plus de 25 ans que j'utilise ce pré rinçage. Jamais de caries, pratiquement aucun tartre. Le dentiste me félicite à chaque fois et me dit de continuer ce que je fais. Juste dommage que les pharmacies ne le tienne plus je dois maintenant le commander ici.

24.03.2026

C**S

Never going back to regular mouthwash!

23.07.2025

R**A

Great pre-brush product!

9.02.2026

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Listerine Plax Advanced PreBrushing Dental Rinse, Soft Mint, 24 Ounce

Description

Specifications

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