Aluminum hydroxide, magnesium hydroxide and simethicone are generic names for the Maalox brand of antacids and anti-gas medications, according to Drugs.com. Maalox and its generic counterparts are available for purchase over-the-counter without a doctor's prescription, but there are prescription-strength versions as well.
Aluminum hydroxide and magnesium hydroxide are natural minerals that relieve heartburn and calm upset stomachs, according to MedlinePlus. Simethicone alleviates the pressure and bloating caused by gas, by combining those gas bubbles within the stomach and intestines in a manner that allows smoother passage. Maalox and compatible generic versions are available in chewable tablet forms and liquid forms.