Name: Ultracef

Pregnancy & Lactation

Pregnancy Category: B

Lactation: enters breast milk; use with caution

Pregnancy Categories

A:Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.

B:May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk.

C:Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done.

D:Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk.

X:Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist.

NA:Information not available.


Half-Life: 1-2 hr; 20-24 hr in renal failure

Peak Plasma Time: 70-90 min

Protein Bound: 20%

Absorption: rapid & well absorbed orally

Distribution: crosses placenta

Vd: 0.31 L/kg

Metabolism: hepatic minimal

Elimination: urine 90% unchanged

Mechanism of Action

First generation semi-synthetic cephalosporin, that arrests bacterial growth by inhibiting bacterial cell wall synthesis. Bactericidal activity against rapidly growing organisms.

Why is this medication prescribed?

Cefadroxil is used to treat certain infections caused by bacteria such as infections of the skin, throat, tonsils, and urinary tract. Cephalexin is in a class of medications called cephalosporin antibiotics. It works by killing bacteria.

Antibiotics such as cefadroxil will not work for colds, flu, or other viral infections. Using antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment.

In case of emergency/overdose

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?

Keep all appointments with your doctor and the laboratory. Your doctor may order certain lab tests to check your response to cefadroxil.

Before having any laboratory test, tell your doctor and the laboratory personnel that you are taking cefadroxil.

If you are diabetic, and test your urine for sugar, use Clinistix or TesTape (not Clinitest) to test your urine while taking this medication..

Do not let anyone else take your medication. Your prescription is probably not refillable.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

Uses of Ultracef

Ultracef is a prescription medication used to treat infections of the urinary tract, skin, and throat (such as pharyngitis and tonsillitis). 

This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.

Ultracef Drug Class

Ultracef is part of the drug class:

  • First generation cephalosporins

Side Effects of Ultracef

Serious side effects have been reported with Ultracef. See the "Ultracef Precautions" section.

Common side effects of Ultracef include:

  • nausea
  • vomiting
  • diarrhea
  • mild rash
  • dyspepsia (indigestion)

This is not a complete list of Ultracef side effects. Ask your doctor or pharmacist for more information.

Tell your doctor if you have any side effect that bothers you or that does not go away.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.