Alka-Seltzer vs. Pepcid for Heartburn: Important Differences and Potential Risks.

Key takeaways

Alka-Seltzer (citric acid/aspirin/sodium bicarbonate) and famotidine (Pepcid AC) are both used to treat heartburn, but they work in different ways and belong to different medication classes. Alka-Seltzer is a combination of an antacid and a nonsteroidal anti-inflammatory drug (NSAID), which helps neutralize stomach acid and relieve pain and inflammation. It is available over-the-counter and comes in dissolvable tablets. Famotidine, on the other hand, is a histamine-2 (H2) antagonist that reduces the amount of acid your stomach produces. It is available both over-the-counter and by prescription, and comes in tablet and liquid forms. Alka-Seltzer is not recommended for children under 12 and contains aspirin, which can cause stomach bleeding and is not safe during pregnancy. Famotidine is generally considered safe during pregnancy and breastfeeding, but it may cause side effects like headache, dizziness, and constipation. Additionally, famotidine needs to be taken twice daily for most conditions, while Alka-Seltzer is taken every 4 to 6 hours as needed.

Alka-Seltzer

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Famotidine

(Pepcid)

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Summary for Alka-Seltzer

Over-the-counter

Alka-Seltzer is a medication used to treat symptoms of heartburn, such as upset stomach and headache. While there are multiple products under this brand, this page focuses on the combination medication containing 3 active ingredients: citric acid, sodium bicarbonate, and aspirin. It comes as tablets that are dissolved in water. You drink the mixture by mouth, typically every 4-6 hours as needed.

Indications for Alka-Seltzer

Heartburn, indigestion, and sour stomach with headache, body aches, or pain
Upset stomach and headache from having too much food or drink
Headache, body aches, and pain alone

Pros and Cons for Alka-Seltzer

Pros

Combination of three medications in a single pill
Easy to take for people who have trouble swallowing pills
Available over the counter

Cons

Might not be safe for children 12 years old and younger
Might need to take multiple times per day
Might not be safe for people with certain health conditions (e.g. kidney problems, heart problems, high bleeding risk)

Common Side Effects for Alka-Seltzer

See Risks and Warnings

Warnings for Alka-Seltzer

Stomach bleeding and ulcers
Reye's syndrome in children
Allergic reactions

Summary for Pepcid

Prescription or over-the-counter

Famotidine (Pepcid) is a type of acid reducer called a histamine-2 (H2) antagonist. It helps treat problems caused by too much stomach acid. Over-the-counter famotidine (Pepcid or Pepcid AC) can help with heartburn in people who are 12 and up. Prescription-only famotidine is for people with more ongoing stomach acid problems and stomach or gut ulcers. This medication is taken by mouth once or twice a day. It usually starts to work within an hour and lasts several hours. Side effects include headache, dizziness, and constipation.

Indications for Pepcid

Over-the-counter famotidine:
- Prevention and relief of heartburn (gastroesophageal reflux disease or GERD)
Prescription famotidine:
- Stomach ulcers
- Intestinal ulcers
- Heartburn (GERD)
- Erosive esophagitis (inflammation of the esophagus) due to GERD
- Other conditions that cause too much stomach acid (e.g., Zollinger-Ellison syndrome)

Pros and Cons for Pepcid

Pros

Available over the counter (OTC) for heartburn
Effects can last for up to several hours after taking
Generally well-tolerated with few side effects and risks
Can take with antacids if needed (e.g., calcium carbonate (Tums))

Cons

Can take 1 to 3 hours to fully work
OTC version not for children under 12 years old
Higher risk of certain side effects in older adults and people with kidney problems
Might not work as well as proton pump inhibitors (PPIs) for relieving heartburn and healing stomach ulcers