---
product_id: 774423008
title: "Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct"
brand: "alka-seltzer"
price: "R$153"
currency: BRL
in_stock: true
reviews_count: 8
category: "Alka Seltzer"
url: https://www.desertcart.com.br/products/774423008-alka-seltzer-extra-strength-heartburn-relief-effervescent-antacid-tablets-fast
store_origin: BR
region: Brazil
---

# Fast-acting relief in seconds Neutralizes 99% excess acid 36 portable sachets for on-the-go Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct

**Brand:** alka-seltzer
**Price:** R$153
**Availability:** ✅ In Stock

## Summary

> ⚡ Fast fizz, fast fix — beat heartburn before it beats you!

## Quick Answers

- **What is this?** Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct by alka-seltzer
- **How much does it cost?** R$153 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/774423008-alka-seltzer-extra-strength-heartburn-relief-effervescent-antacid-tablets-fast)

## Best For

- alka-seltzer enthusiasts

## Why This Product

- Trusted alka-seltzer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Legacy of Trust:** Backed by 90+ years of proven performance, join millions who rely on Alka-Seltzer for fast indigestion relief.
- • **Effervescent Power:** Fizzing formula ensures fast absorption and easy consumption without residue—just pure relief.
- • **Travel-Ready Relief:** 36 individually packed tablets fit perfectly in your bag or desk drawer for heartburn relief anytime, anywhere.
- • **Aspirin-Free Formula:** Gentle on your system with no aspirin, relying on trusted active ingredients for safe, effective relief.
- • **Instant Acid Neutralizer:** Dissolves quickly to neutralize 99% of stomach acid within seconds, so you never miss a beat.

## Overview

Alka-Seltzer Extra Strength Heartburn Relief Effervescent Tablets deliver rapid indigestion and heartburn relief by neutralizing 99% of excess stomach acid within seconds. Each travel-friendly sachet contains a powerful aspirin-free formula of anhydrous citric acid and sodium bicarbonate, designed for easy dissolution and quick absorption. Trusted for over 90 years, this 36-count pack ensures you have fast, reliable relief wherever life takes you.

## Description

Don’t let indigestion and heartburn interrupt your day, Alka-Seltzer Extra Strength Heartburn Relief tablets start neutralizing excess stomach acid in seconds. Drop 2 antacid tablets in water to get fast indigestion relief that neutralizes 99% of excess acid. With a dose per sachet, Alka-Seltzer Heartburn Relief Extra Strength tablets are convenient and portable so relief is always within reach, from the pantry, to your pocket. These tablets contain the active ingredients Anhydrous citric acid and Sodium bicarbonate. To use, fully dissolve antacid tablets in 4 ounces of water before taking. Adults and children 12 years old and over can take 2 tablets every 4 hours as needed, or as directed by a doctor. Do not take more than 8 tablets in 24 hours.

Review: Speedy Recovery from Mucus - I used this after getting a bad cold. I had gotten a lot of mucus buildup and my stomach was upset with all the mucus. Within an hour after taking only 1 dose of this, I felt much better. It clears up excess mucus. I think it could have something to do with the sodium.
Review: Works instantly - Easy to use & instant relief.

## Features

- Fast Indigestion & Heartburn Relief: Alka-Seltzer Extra Strength Heartburn Relief Effervescent Tablets have you covered with fast acid indigestion relief and heartburn.
- Nothing Works Faster: Quickly dissolves and starts working in seconds to neutralize 99% of excess acid
- Portable Sachets: This travel-friendly pack includes 36 individual packets of antacid tablets. Designed for easy storage, so quick heartburn relief is always within reach
- Easy To Use: Fully dissolve 2 tablets in 4oz of water, fizz it and drink it. You do not have to drink any of the residue that may be on the bottom of the glass. The medicines of Alka-Seltzer Extra Strength Heartburn Relief are in the water
- Does Not Contain Aspirin: These effervescent antacid tablets contain the active ingredients Anhydrous citric acid and Sodium bicarbonate
- Trusted For Over 90 Years: Your go-to brand for fast heartburn relief since 1931

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0FF4KJC5B |
| ASIN  | B0FF4KJC5B |
| Active Ingredients | Anhydrous citric acid, Sodium bicarbonate |
| Additional Features | Fast-Acting, Targeted |
| Age Range Description | Adult |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | #4,733 in Health & Household ( See Top 100 in Health & Household ) #50 in Antacids |
| Brand Name | Alka-Seltzer |
| Coin Variety 1 | Extra Strength |
| Customer Reviews | 4.7 4.7 out of 5 stars (397) |
| Date First Available  | June 23, 2025 |
| Flavor | unflavored |
| Global Trade Identification Number | 00016500603214 |
| Item Dimensions | 3.19 x 1.93 x 4.02 inches |
| Item Form | Tablet |
| Manufacturer | Alka-Seltzer |
| Manufacturer  | Alka-Seltzer |
| Net Content Count | 36 Count |
| Number of Items | 36 |
| Product Benefits | Heartburn Relief, Sour Stomach Relief, Acid Indigestion Relief, Upset Stomach Relief, Fast-Acting, Multi-Symptom Relief |
| Product Dimensions  | 3.19 x 1.93 x 4.02 inches; 5.4 ounces |
| Special Ingredients | Extra Strength Active Ingredients |
| Specific Uses For Product | Heartburn, Sour Stomach, Acid Indigestion, Upset Stomach |
| Target Audience | Unisex-Adults |
| UPC | 016500603214 |
| Unit Count | 36 Count |

## Product Details

- **Active Ingredients:** Anhydrous citric acid, Sodium bicarbonate
- **Brand:** Alka-Seltzer
- **Item dimensions L x W x H:** 3.19 x 1.93 x 4.02 inches
- **Specific Uses For Product:** Heartburn, Sour Stomach, Acid Indigestion, Upset Stomach

## Images

![Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct - Image 1](https://m.media-amazon.com/images/I/811LKXL0IuL.jpg)
![Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct - Image 2](https://m.media-amazon.com/images/I/71QgqLXSAYL.jpg)
![Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct - Image 3](https://m.media-amazon.com/images/I/71Av1oxbA0L.jpg)
![Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct - Image 4](https://m.media-amazon.com/images/I/71w++avsE6L.jpg)
![Alka-Seltzer Extra Strength Heartburn Relief Effervescent Antacid Tablets, Fast Indigestion Relief, 36Ct - Image 5](https://m.media-amazon.com/images/I/81TwcSGhN6L.jpg)

## Questions & Answers

**Q: What’s the difference between Alka-Seltzer effervescent tablets and ReliefChews?**
A: Both effervescent tablets and ReliefChews are portable and deliver fast multi-symptom relief. Effervescent tablets dissolve in water for fizzy, refreshing relief you can hear, see and feel. ReliefChews are delicious and chewy.

**Q: What temperature of water should I use to dissolve Alka-Seltzer tablets?**
A: The best temperature is room temperature. Cold water will slow down dissolution and warm water can make it foam excessively.

**Q: Is Alka-Seltzer the same as baking soda?**
A: Not exactly. Baking soda (sodium bicarbonate) does not contain anhydrous citric acid, the main active ingredient in Alka-Seltzer effervescent tablets that relieve heartburn and acid indigestion.

**Q: What makes Alka-Seltzer fizz?**
A: Alka-Seltzer contains citric acid and sodium bicarbonate (baking soda). When you drop the tablet in water, the acid and the baking soda react – this produces fizz.

**Q: What are the active ingredients in Alka-Seltzer ReliefChews?**
A: ReliefChews contain calcium carbonate (antacid). Heartburn+Gas Relief Chews contain calcium carbonate (antacid) and simethicone (antigas).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Speedy Recovery from Mucus
*by G***I on February 26, 2026*

I used this after getting a bad cold. I had gotten a lot of mucus buildup and my stomach was upset with all the mucus. Within an hour after taking only 1 dose of this, I felt much better. It clears up excess mucus. I think it could have something to do with the sodium.

### ⭐⭐⭐⭐⭐ Works instantly
*by S***. on March 1, 2026*

Easy to use & instant relief.

### ⭐⭐⭐⭐⭐ Alka-Seltzer for heartburn
*by J***D on December 14, 2025*

This is my favorite for when I get heartburn. Great price, quick shipping. Just what I needed.

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-03-09*