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Xtra Strength

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24 Tabs
  • Antacid

  • Extra strength formula

  • Promotes pain relief
Alka-Seltzer Xtra Strength is an antacid and pain relief medicine that delivers fast relief of acid indigestion, upset stomach, heartburn with headache and body aches. It works any time, day or night.

Product Label

Drug Facts

Active ingredients Purpose
Anhydrous citric acid 1000 mg Antacid
Aspirin 500 mg Analgesic
Sodium bicarbonate (heat treated) 1985 mg Antacid


for the relief of

  • heartburn, acid indigestion, and sour stomach when accompanied with headache or body aches and pains
  • upset stomach with headache from over-indulgence in food or drink
  • headache, body aches, and pain alone


Reye's syndrome: Children and teenagers should not use this medicine for chicken pox or flu symptoms before a doctor is consulted about Reye's syndrome, a rare but serious illness reported to be associated with aspirin. Allergy Alert: Aspirin may cause a severe allergic reaction which may include:

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

Alcohol Warning: If you consume 3 or more alcoholic drinks every day, ask your doctor whether you should take aspirin or other pain relievers/fever reducers. Aspirin may cause stomach bleeding.

Do not use if you have ever had an allergic reaction to aspirin or any other pain reliever/fever reducer.

Ask a doctor before use if you have

  • asthma
  • ulcers
  • bleeding problems
  • stomach problems that last or come back frequently, such as heartburn, upset stomach, or pain
  • 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 anticoagulation (blood thinning), 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
  • symptoms get worse or last more than 10 days
  • redness or swelling is present
  • ringing in the ears or 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.


  • fully dissolve 2 tablets in 4 ounces of water before taking
Adults and children 12 years and older 2 tablets every 6 hours, or as directed by a doctor do not exceed 7 tablets in 24 hours
Adults 60 years and older 2 tablets every 6 hours, or as directed by a doctor do not exceed 3 tablets in 24 hours
Childer under 12 years consult a doctor

Other Information

  • each tablet contains: sodium 588 mg
  • store at room temperature. Avoid excessive heat.
  • Alka-Seltzer in water contains principally the antacid sodium citrate and the analgesic sodium acetylsalicylate.

Inactive Ingredients


Questions or Comments?

1-800-986-0369 (Mon-Fri 9AM-5PM EST)or www.alkaseltzer.com

Terms and Ingredient Definitions

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