Aspirin, Sodium Bicarbonate, and Citric Acid (Systemic)

Brand Names : Alka-Seltzer Effervescent Pain Reliever and Antacid, Flavored Alka-Seltzer Effervescent Pain Reliever and Antacid, acetylsalicylic acid, ASA

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although the following side effects occur very rarely when 1 or 2 doses of this combination medicine is taken occasionally, they may be more likely to occur if:

• too much medicine is taken.
• the medicine is taken several times a day.
• the medicine is taken for more than a few days in a row.

Get emergency help immediately if any of the following side effects occur:

Any loss of hearing; bloody urine; confusion; convulsions (seizures); diarrhea (severe or continuing); difficulty in swallowing; dizziness, lightheadedness, or feeling faint (severe); drowsiness (severe); excitement or nervousness (severe); fast or deep breathing; flushing, redness, or other change in skin color; hallucinations (seeing, hearing, or feeling things that are not there); nausea or vomiting (severe or continuing); shortness of breath, troubled breathing, tightness in chest, or wheezing; stomach pain (severe or continuing); swelling of eyelids, face, or lips; unexplained fever; uncontrollable flapping movements of the hands (especially in elderly patients); vision problems

Signs of overdose in children

Changes in behavior; drowsiness or tiredness (severe); fast or deep breathing

Also, check with your doctor as soon as possible if any of the following side effects occur:

Less common or rare

Bloody or black, tarry stools; frequent urge to urinate; headache (severe or continuing); increased blood pressure; loss of appetite (continuing); mood or mental changes; muscle pain or twitching; ringing or buzzing in ears (continuing); skin rash, hives, or itching; slow breathing; swelling of face, fingers, ankles, feet, or lower legs; unpleasant taste; unusual tiredness or weakness; vomiting of blood or material that looks like coffee grounds; weight gain (unusual)

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your health care professional if any of the following side effects continue or are bothersome:

Heartburn or indigestion; increased thirst; nausea or vomiting; stomach pain (mild)

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.