Danger and bismuth. Not really, it does not get absorb to the degree of causing harm. But everything in excess might have some consequence. Common sense should prevail while using any medication.
No. Bismuth subsalicylate is found in peptobismol. Maalox is magnesium and aluminum hydroxide.
No. It does not. There a few different maalox preparations containing aluminum hydroxide, magnesium hydroxide, simethicone or calcium carbonate.