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  • Title: Effect of lactulose, neomycin and antacid on colonic pH recorded continuously with an implanted electrode.
    Author: Mann NS, Borkar BB, Narenderan KP, Kadian RS, Mann SK, Martin RL.
    Journal: Am J Gastroenterol; 1979 Aug; 72(2):141-5. PubMed ID: 38663.
    Abstract:
    Colonic pH was continuously monitored by a pH electrode implanted in the transverse colon of rats over a 24-hour period. Lactulose significantly reduced the colonic pH to 5.37 +/- .39 from a fasting value of 6.77 +/- .75. Pretreatment with neomycin or concomitant use of a nonabsorbable antacid prevented lactulose-induced reduction in the colonic pH. The clinical implication of the study is that combined use of lactulose with neomycin or high doses of non-absorbable antacids in the treatment of chronic portasystemic encephalopathy may be undesirable.
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