Maalox is now certified as kosher by the OU.
http://oukosher.org/index.php/articles/single/5315/
Novartis Consumer Health, Inc. and the Orthodox Union have jointly announced the first kosher certification of a mainstream adult over-the-counter (OTC) medication, Maalox®, the popular heartburn remedy. Today’s announcement is the second time Novartis has received a kosher certification on one of its OTC products.
With last year’s announcement of the kosher-certification of Triaminic®, a children’s cough, cold and allergy product, Novartis became the first major OTC company to receive OU certification.
Maalox® will begin carrying the kosher certification symbol in early October. However, formulations of Maalox® that are currently on the shelves already are kosher compliant. This includes all chewable and most of the liquid formulations. The only product that is not kosher-certified is Maalox® Total Stomach Relief.