> It's the sodium bicarbonate that provides the sleeping agent, carbon
> dioxide. Citric acid just releases the carbon dioxide from the
> bicarbonate form. In the stomach, where the stuff is intended, HCl would
> do that fine, so I'm not sure why the citric acid is there. However, were
> there not some acidifying agent, the bicarbonate would not release the
> CO-2.
>
> Dave
>
> geoffrey kimber <gkimber2-in-gmail.com> wrote:
> The original alkaseltzer tablet is:
>
> Aspirin - 325 MG
> Sodium Bicarbonate - 1916 MG
> Citric Acid - 1000 MG
>
> If you wanted, you could buy the citric acid, but I expect that clove
> oil is much cheaper and easier to transport.
>
> Geoff
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