No. It does not. There a few different maalox preparations containing aluminum hydroxide, magnesium hydroxide, simethicone or calcium carbonate.
No. Bismuth subsalicylate is found in peptobismol. Maalox is magnesium and aluminum hydroxide.
No. It does not.
Age? Indication? If you're >12 years old, for acute diarrhea, the dose is 2 tabs or 30 ccs every 30-60 minutes as needed with a 24 hour maximum of 16 tabs or 240 ccs. For h. Pylori infection, the dose is 2 tabs or 30 ccs four times a day for 10-28 days. If you have kidney disease, you should avoid it all together or be under medical supervision.
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.