Generic name: Ceftibuten.

Cedax is a cephalosporin antibiotic. It interferes with the production of certain biochemicals necessary for bacteria to sustain life. 

Quick Facts About Cedax


Used to treat mild to moderate bacterial infections of the throat, lungs, ears, skin, and respiratory tract including strep throat, tonsillitis, and middle-ear infections in children and adults. Also prescribed for acute bronchitis in adults.

Cedax Dosage

Take exactly as prescribed; take all medication or infection may return. Take at approximately the same time every day. Capsules may be taken with or without food. Oral suspension must be taken at least 2 hours before a meal or 1 hour after. Shake well before using. Keep oral suspension in the refrigerator and discard after 14 days.

  • Usual adult dose: 400 milligrams once per day.
  • Usual child dose: for children weighing over 90 pounds — 400 milligrams once per day. For children weighing under 90 pounds — 9 milligrams per 2.2 pounds of body weight, once per day. Your doctor will specify the number of teaspoonfuls required.
  • Missed dose: take as soon as possible, unless almost time for next dose. In that case, do not take missed dose; go back to regular schedule. Do not double doses.

Cedax Side Effects

Overdose symptoms:

none reported. However, if you experience convulsions or suspect an overdose, immediately seek medical attention.

More common side effects: diarrhea, headache, nausea.

Less common Cedax side effects: abdominal pain, dizziness, vomiting. Rare side effects: belching, constipation, difficulty breathing, drowsiness, dry mouth, fatigue, gas, hives, indigestion, itching, loose stools, loss of appetite, painful urination, rash, stuffy nose, taste alteration, tingling, vaginal inflammation, yeast infection.


Inform your doctor before combining Cedax with:

Zantac or probenecid (Benemid). May decrease effectiveness of oral contraceptives used for birth control.

No known food/other substance interactions. 

Special Cautions

If pregnant or planning to become pregnant, inform your doctor immediately. Appears in breast milk; could affect nursing infant.

No special precautions apply to seniors.

Children are most likely to experience diarrhea as a side effect.

  • Inform your doctor before taking Cedax if you are allergic to penicillin or cephalosporin (such as Ceftin and Keflex) antibiotics in any form. If allergic to both, reaction to Cedax could be severe: swelling of the face, lips, tongue, and throat, making it difficult to breathe. If symptoms appear, immediately seek medical attention. .
  • Take with caution if you have a history of colitis or other gastrointestinal disease. Inform your doctor immediately if you develop diarrhea; it could indicate a serious problem.
  • Inform your doctor before taking if you have kidney problems or are diabetic.
  • If new infections occur, inform your doctor. He or she may treat you with a different antibiotic.
  • Do not share this medication with other people or use it for other infections before checking with your doctor; it may not be effective.
  • Women taking birth control pills should use another form of contraception while taking Cedax and for the rest of the current menstrual cycle.
  • May produce a false positive for some glucose and protein tests.


HealthSurvey.org provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Cedax side effects, please contact your healthcare provider.