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Can lactulose go bad and if so how can you tell (other than the expiry date) like taste, color etc?

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themctier 27 Apr 2017

Per https://www.drugs.com/pro/lactulose.html, which is said to be from the FDA:

"Under recommended storage conditions, a normal darkening of color may occur. Such darkening is characteristic of sugar solutions and does not affect therapeutic action. Prolonged exposure to temperatures above 86°F (30°C) or to direct light may cause extreme darkening and turbidity which may be pharmaceutically objectionable. If this condition develops, do not use."

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