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Gas-X
Gas-X®  relieves multiple gas symptoms, like pressure,  bloating and possibly belching or
burping So the users can relax, refocus, and get back on track. Gas-X contains
Simethicone which is a doctor recommended ingredient to treat gas, and it's available
without a prescription. Gas-X comes in three dosage forms for users to take: softgel,
chewable, and the new Thin Strips® form.

What is the function of simethicone in Gas-X?
Simethicone is an anti-foaming agent. Simethicone is described in the NATIONAL
FORMULARY, 14th Edition, American Pharmaceutical Association, Washington, D.C.,
1975, at page 648, as a mixture of not less than 93% and not more than 99% of
dimethylpolysiloxane and not less than 4% and not more than 4.5% of
silicon dioxide.
Other characteristics of simethicone are described in the aforementioned publication at
the page indicated, and that description is incorporated herein by reference. [1]

Dimethylpolysiloxane is sometimes referred to as polysiloxane or organopolysiloxane.
Related mixtures can also be used, e.g., another mixture of polydimethylsiloxane and a
high surface area silica. [1]

In colonoscopy examination, luminal visibility is frequently limited due to intraluminal
bubbles. A study shows that taking simethicone after an oral polyethylene glycol or sodium
phosphate preparation can improve colonic visibility by diminishing colonic bubbles. [2]

Reference
[1] US Patent Application Publication No. 20060193845
[2] Park JJ, Lee SK, Jang JY, Kim HJ, Kim NH. The effectiveness of simethicone in
improving visibility during colonoscopy. Hepatogastroenterology. 2009
Sep-Oct;56(94-95):1321-5.