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Alka-Seltzer, Heartburn Relief, Extra Strength, 24 Effervescent Tablets

Alka-Seltzer, Heartburn Relief, Extra Strength, 24 Effervescent Tablets

Regular price $7.15 USD
Regular price $7.15 USD Sale price $7.15 USD
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Product Overview


  • Anhydrous Citric Acid / Antacid
  • Aspirin (NSAID) / Analgesic
  • Sodium Bicarbonate / Antacid

Fast Relief of: 

  • Heartburn
  • Upset Stomach
  • Acid Indigestion
  • With Headache
  • Body Aches

Uses: 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

Expiration Date

03/01/2026 00:00:00




Drug Facts
Active Ingredients (in each tablet) Purpose
Anhydrous citric acid 1,000 mg
Aspirin 500 mg (NSAID)*
Sodium Bicarbonate (heat-treated) 1,985 mg
*nonsteroidal anti-inflammatory drug
Inactive Ingredients
Magnesium stearate, mannitol.
Each tablet contains: sodium 586 mg

Suggested Use

  • Place two (2) tablets in 4 oz of water. Dissolve tablets completely.
  • You do not have to drink any of the residue that may be on the bottom of the glass. The medicines of Alka-Seltzer® are in the water.
  • Take Alka-Seltzer® any time - morning, noon, or night - when you need relief from heartburn, upset stomach, acid indigestion with headache or body aches.
Adults and children 12 years and over
2 tablets every 4 hours, or as directed by a doctor
Do not exceed 8 tablets in 24 hours
Adult 60 years and over
2 tablets every 4 hours, or as directed by a doctor
Do not exceed 4 tablets in 24 hours
Children under 12 years
Consult a doctor


Reye's syndrome: Children and teenagers who have or are recovering from chicken pox or flu-like symptoms should not use this product. When using this product, if changes in behavior with nausea and vomiting occur, consult a doctor because these symptoms could be an early sign of Reye's syndrome, a rare but serious illness. 

Allergy alert: Aspirin may cause a severe allergic reaction which may include: 

  • hives 
  • facial swelling 
  • asthma (wheezing) 
  • shock 

Stomach bleeding warning: This product contains an NSAID, which may cause severe stomach bleeding. The chance is higher if you 

  • are age 60 or older 
  • have had stomach ulcers or bleeding problems 
  • take a blood thinning (anticoagulant) or steroid drug 
  • take other drugs containing prescription or nonprescription NSAIDs (aspirin, ibuprofen, naproxen, or others) 
  • have 3 or more alcoholic drinks every day while using this product 
  • take more or for a longer time than directed

Do not use

  • if you are allergic to aspirin or any other pain reliever/fever reducer 
  • if you have ever had an allergic reaction to this product or any of its ingredients 

Ask a doctor before use if 

  • stomach bleeding warning applies to you 
  • you have a history of stomach problems, such as heartburn 
  • you have high blood pressure, heart disease, liver cirrhosis, or kidney disease 
  • you are taking a diuretic 
  • you have asthma 
  • you have a sodium-restricted diet 

Ask a doctor or pharmacist before use if you are 

  • presently taking a prescription drug. Antacids may interact with certain prescription drugs
  • taking a prescription drug for diabetes, gout, or arthritis 

When using this product do not exceed recommended dosage 

Stop use and ask a doctor if

  • an allergic reaction occurs. Seek medical help right away. 
  • you experience any of the following signs of: stomach bleeding, feel faint, vomit blood, have bloody or black stools, have stomach pain that does not get better 
  • symptoms get worse or last more than 10 days 
  • redness or swelling is present 
  • ringing in the ears or a loss of hearing occurs 
  • new symptoms occur

If pregnant or breast-feeding, ask a health professional before use. It is especially important not to use aspirin during the last 3 months of pregnancy unless definitely directed to do so by a doctor because it may cause problems in the unborn child or complications during delivery. 

Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away.

Store at room temperature. Avoid excessive heat. 

Alka-Seltzer in water contains principally the antacid sodium citrate and the analgesic sodium acetylsalicylate.