Drug Interaction Report

ADJUST DOSING INTERVAL: The concomitant administration of magnesium trisilicate may significantly reduce the bioavailability of proguanil by reducing its absorption. Therapeutic failure may result. Other antacids and absorbent antidiarrheals may also interact with proguanil.

MANAGEMENT: Antacids or antidiarrheals and proguanil should be taken at least 2 to 3 hours apart.

ADJUST DOSING INTERVAL: The concomitant administration of magnesium trisilicate may significantly reduce the bioavailability of proguanil by reducing its absorption. Therapeutic failure may result. Other antacids and absorbent antidiarrheals may also interact with proguanil.

MANAGEMENT: Antacids or antidiarrheals and proguanil should be taken at least 2 to 3 hours apart.

ADJUST DOSING INTERVAL: Administration with food may increase the absorption of calcium. However, foods high in oxalic acid (spinach or rhubarb), or phytic acid (bran and whole grains) may decrease calcium absorption.

MANAGEMENT: Calcium may be administered with food to increase absorption. Consider withholding calcium administration for at least 2 hours before or after consuming foods high in oxalic acid or phytic acid.