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Phazyme

Phazyme is an over-the-counter gas relief brand offering simethicone-based products and a gas & acid chew.

Last updated September 11, 2026

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Overview

Phazyme is an over-the-counter gas relief brand. Its product line includes Phazyme Ultimate Strength 500mg, Maximum Strength 250mg, and Ultra Strength 180mg gas relief, plus Phazyme Gas & Acid, a cherry chew for gas and heartburn relief. The brand states it has provided gas relief for over 30 years and began in the 1970s, initially promoted to physicians. It was bought by Block Drug Company, which ran a campaign themed "Don't Make the Antacid Mistake," and in 2012 the brand was bought by Fleet Laboratories.

History

Phazyme began in the 1970s, when it was promoted only to physicians as an over-the-counter medicine to fight gas attacks. In the early 1980s, there was still confusion among consumers about the difference between anti-gas and antacid products; when Block Drug Company bought Phazyme, it launched a campaign themed "Don't Make the Antacid Mistake" to address those differences. In 2012, the Phazyme brand was bought by Fleet Laboratories, a company with more than 140 years in the personal healthcare industry. The brand states it has provided reliable gas relief for over 30 years.

Products and positioning

The strongest name in gas relief just got stronger.

  • Phazyme Ultimate Strength 500mg Gas Relief

    1 soft gel dose provides the strongest dose gas relief available over the counter.

  • Phazyme Maximum Strength 250mg Gas Relief

    The strongest single-dose #1 doctor-recommended anti-gas ingredient available (simethicone).

  • Phazyme Ultra Strength 180mg Gas Relief

    Strong gas relief from the brand you've know and trusted for over 30 years. Now available in new easy-to-open bottles and blister packs.

  • Phazyme Gas & Acid

    Fast and effective relief of Gas and Acid in great-tasting cherry chew.

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