Liquid

Regular Strength
Aluminum hydroxide 95mg. Magnesium carbonate 358mg in each 15 ml

Extra Strength
Aluminum hydroxide 254mg. Magnesium carbonate 237.5mg in each 15 ml

Tablets

Regular
Aluminum hydroxide 80mg. Magnesium carbonate 14.2mg in each tablet

Extra Strength
Aluminum hydroxide 160mg. Magnesium carbonate 105mg in each tablet.

All contain "alginate".

All formulations contain "alginate". Alginic acid + bicarbonate = foam barrier or "raft" that floats on the stomach acid. 

If acid reflux occurs, this raft foam barrier is the first to contact the esophageal wall, protecting against the stomach acid.

The gel and raft formation is pretty fast. Expect to start feeling relief in about 5 mins. Depending on how bad the symptoms.

About 6 to 8 hours. Longer than the average antacid.

Unique action provide immediate relief, faster than traditional antacid, and longer duration, again longer than traditional antacids.

Can eliminate or displace acid pockets in the stomach. (Kwiatek, MA et al)

Chewable tablets foams in the mouth while chewing. Some people may find this uncomfortable and need getting used to.

Good choice if you can get past the foaming action of the chewable tablet in the mouth. Be sure to drink a full glass of water after.

Liquid may be a better choice if you don't need to carry it around.

Combine with H2 or PPI for maximum effect.

Stay with the brand if cost is not a factor for taste and also the strength of the raft or foaming action depends on the type and quality of alginate used.

Regular Strength
Calcium Carbonate 500mg in each chewable tablet

Extra Strength
Calcium Carbonate 750mg in each chewable tablet.

Ultra Strength
Calcium Carbonate 1000mg in each chewable tablet.

Smoothies
Calcium Carbonate 750mg in each chewable tablet.

Chewy Delights
Calcium Carbonate 1177mg in each chewable tablet.

Chewy Bites®
Calcium Carbonate 750mg in each chewable tablet.

Chewy Bites® with Gas Relief
Calcium carbonate 750mg. Simethicone 80 mg.

Antacid for the relief of stomach acid and indigestion.

Daily source of extra calcium.

10 minutes. Depending on severity.

Average 4 hours.

Taste. But depends on the type. Smoothies taste different than chewy delights and so on.

Can be taken by children as young as 2 years old. Good for an extra source of calcium (300 mg per tablet in children's tums. A 38% % Daily Value).

Good source of calcium also for adults.

Possible  acid rebound effect as the acid neutralizing effect wears off. 

It can stimulate the release of gastrin which is responsible for the secretion of acid in the stomach. This effect occurs with antacids containing calcium carbonate, but more pronounced with Tums since it is just calcium carbonate.

Effervescent Tabs

Original
Anhydrous citric acid 1000 mg, Aspirin 325 mg (NSAID), Sodium bicarbonate (heat-treated) 1916 mg in each tablet.

Extra Strength
Anhydrous citric acid 1000 mg, Aspirin 500 mg (NSAID), Sodium bicarbonate (heat-treated) 1985 mg in each tablet.

Lemon-Lime
Anhydrous citric acid 1000 mg, Aspirin 325 mg (NSAID), Sodium bicarbonate (heat-treated) 1700 mg in each tablet.

Heartburn
Anhydrous citric acid 1000 mg, Sodium bicarbonate (heat-treated) 1940 mg in each tablet.

Gold
Anhydrous citric acid 1000 mg, Potassium bicarbonate 344 mg, Sodium bicarbonate (heat-treated) 1050 mg in each tablet.

ReliefChews®

Extra Strength
Calcium carbonate 750 mg in each chewable tab.

Ultra Strength
Calcium carbonate 1000 mg in each chewable tab.

Heartburn+Gas
Calcium carbonate 750 mg, Simethicone 80 mg in each chewable tab.

Gummies
Calcium (elemental) 500 mg,  Phosphorus 230 mg, Sodium 15 mg in 2 gummies.

Depending on ingredients:
For the temporary relief of:● heartburn, acid indigestion, and sour stomach when accompanied with headache or body aches and pains● upset stomach with headache from overindulgence in food or drink● headache, body aches, and pain alone.

5 to 20 minutes depending on symptoms

Average 3 to 4 hours

Effervescent delivery method provides liquid medication without the syrupy or suspension feel and thickness.

A fast method of relieving headache with stomach ache. 

Choose wisely. Some preparations contain aspirin.

REGULAR TABLETS
Calcium carbonate 550 mg, Magnesium hydroxide 110 mg in each tablet.

EXTRA STRENGTH TABS.
Calcium carbonate 675 mg, Magnesium hydroxide 135mg in each tablet.

ULTRA STRENGTH TABS
Calcium carbonate 1000 mg, Magnesium hydroxide 200 mg in each tablet.

ADVANCED TABS
Calcium carbonate 1000 mg, Magnesium hydroxide 200 mg, Simethicone 40mg in each tablet.

Relieves heartburn, sour stomach, acid indigestion.

10 to 20 minutes depending on severity

3 to 4 hours

Good relief with the "Ultra Strength" if taken with food.

Significant source of calcium and magnesium.

Don't expect it to taste like Rolaids of old. This is much sweeter, harder to chew and granular.

Significant source of calcium and magnesium.

Tablets
Aluminum hydroxide 200 mg, Magnesium hydroxide 200mg, Simethicone 25 mg in each tablet.

Relieves heartburn, sour stomach, acid indigestion, bloating, pressure and discomfort commonly referred to as gas.

Average 10 to 20 minutes

3 to 4 hours

Simethicone helps with bloating and indigestion.

Taste and packaging is desirable.

Cost.

Availability in local stores.

Tonight
Calcium Carbonate 800 mg, Magnesium hydroxide 270mg, Simethicone 80 mg in each 10 ml.

Maximum Strength
Aluminum hydroxide 800 mg, Magnesium hydroxide 800 mg, Simethicone 80 mg in each 10 ml.

For Heartburn, Acid indigestion, Sour stomach, Upset stomach due to these symptoms, Pressure and bloating commonly referred to as gas, Overindulgence in food and drink

10 to 20 minutes

3 to 4 hours

Combination with simethicone, an antigas, is useful for bloating and painful gas pockets in the stomach.

Vanilla caramel flavor taste good.

No tablet formulation, so difficult to take with you. Mini is just for gas relief.

Know that the Maximum strength contain aluminum hydroxide and Tonight contain calcium carbonate.

A good brand name equivalent to Mylanta is Gelusil.

Chewable

Regular Strength
Calcium carbonate 600 mg in each tablet

Advanced Maximum Strength
Calcium Carbonate 1000mg, Simethicone 60mg in each tablet.

Liquid

Regular Strength
Aluminum hydroxide 200 mg, Magnesium hydroxide 200 mg, Simethicone 20 mg in each 5 ml.

Advanced Maximum Strength
Aluminum hydroxide 400 mg, Magnesium hydroxide 400 mg, Simethicone 40 mg in each 5 ml

Total Relief
Bismuth Subsalicylate 525 mg

For the relief of Heartburn, Acid indigestion, Sour stomach, Upset stomach associated with these symptoms, Pressure and bloating commonly referred to as gas.

 10 to 20 minutes

3 to 4 hours

Preparations with simethicone is useful for bloating and painful gas pockets in the stomach that may accompany some cases of heartburn and indigestion.

Constipation may occur at maximum dose.

Warning: Maalox Total Relief contains Bismuth Subsalicylate. Children and teenagers who have or are recovering from chicken pox or flu-like symptoms should not use this product.

Warning: Maalox Total Relief contains Bismuth Subsalicylate. Children and teenagers who have or are recovering from chicken pox or flu-like symptoms should not use this product.