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Cefadroxil

Cefadroxil is a broad-spectrum antibiotic effective in G+ and G- bacterial infections. It belongs to bactericidal antibiotics.

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Cephalosporins
From Gale Encyclopedia of Medicine, 4/6/01 by Nancy Ross-Flanigan

Definition

Cephalosporins are medicines that kill bacteria or prevent their growth.

Purpose

Cephalosporins are used to treat infections in different parts of the body -- the ears, nose, throat, lungs, sinuses, and skin, for example. Physicians may prescribe these drugs to treat pneumonia, strep throat, staph infections, tonsillitis, bronchitis, and gonorrhea. These drugs will not work for colds, flu, and other infections caused by viruses.

Description

Examples of cephalosporins are cefaclor (Ceclor), cefadroxil (Duricef), cefazolin (Ancef, Kefzol, Zolicef), cefixime, (Suprax), cefoxitin (Mefoxin), cefprozil (Cefzil), ceftazidime (Ceptaz, Fortaz, Tazicef, Tazideme), cefuroxime (Ceftin) and cephalexin (Keflex). These medicines are available only with a physician's prescription. They are sold in tablet, capsule, liquid, and injectable forms.

Recommended dosage

The recommended dosage depends on the type of cephalosporin. Check with the physician who prescribed the drug or the pharmacist who filled the prescription for the correct dosage.

Always take cephalosporins exactly as directed by your physician. Never take larger, smaller, more frequent, or less frequent doses. Take the drug for exactly as long as directed -- no more and no less. Do not save some doses of the drug to take for future infections. The medicine may not be right for other kinds of infections, even if the symptoms are the same. In addition, take all of the medicine to treat the infection for which it was prescribed. The infection may not clear up completely if too little medicine is taken. Taking this medicine for too long, on the other hand, may open the door to new infections that do not respond to the drug.

Some cephalosporins work best when taken on an empty stomach. Others should be taken after meals. Check with the physician who prescribed the medicine or the pharmacist who filled the prescription for instructions on how to take the medicine.

Precautions

Certain cephalosporins should not be combined with alcohol or with medicines that contain alcohol. Abdominal or stomach cramps, nausea, vomiting, facial flushing, and other symptoms may result within 15-30 minutes and may last for several hours. Do not drink alcoholic beverages or use other medicines that contain alcohol while being treated with cephalosporins and for several days after treatment ends.

Special conditions

People with certain medical conditions or who are taking certain other medicines can have problems if they take cephalosporins. Before taking these drugs, be sure to let the physician know about any of these conditions:

Allergies

Severe allergic reactions to this medicine may occur. Anyone who is allergic to cephalosporins of any kind should not take other cephalosporins. Anyone who is allergic to penicillin should check with a physician before taking any cephalosporin. The physician should also be told about any allergies to foods, dyes, preservatives, or other substances.

Diabetes

Some cephalosporins may cause false positive results on urine sugar tests for diabetes. People with diabetes should check with their physicians to see if they need to adjust their medication or their diets.

Phenylketonuria

Oral suspensions of cefprozil contain phenylalanine. People with phenylketonuria (PKU) should consult a physician before taking this medicine.

Pregnancy

Women who are pregnant or who may become pregnant should check with their physicians before using cephalosporins.

Breastfeeding

Cephalosporins may pass into breast milk and may affect nursing babies. Women who are breastfeeding and who need to take this medicine should check with their physicians. They may need to stop breastfeeding until treatment is finished.

Other medical conditions

Before using cephalosporins, people with any of these medical problems should make sure their physicians are aware of their conditions:

  • History of stomach or intestinal problems, especially colitis. Cephalosporins may cause colitis in some people.
  • Kidney problems. The dose of cephalosporin may need to be lower.
  • Bleeding problems. Cephalosporins may increase the chance of bleeding in people with a history of bleeding problems.
  • Liver disease. The dose of cephalosporin may need to be lower.
Use of certain medicines

Taking cephalosporins with certain other drugs may affect the way the drugs work or may increase the chance of side effects.

Side effects

Get medical attention immediately if any of these symptoms develop while taking cephalosporins:

  • Shortness of breath
  • Pounding heartbeat
  • Skin rash or hives
  • Severe cramps or pain in the stomach or abdomen
  • Fever
  • Severe watery or bloody diarrhea (may occur up to several weeks after stopping the drug)
  • Unusual bleeding or bruising.

Other rare side effects may occur. Anyone who has unusual symptoms during or after treatment with cephalosporins should get in touch with his or her physician.

Interactions

Some cephalosporins cause diarrhea. Certain diarrhea medicines, such as diphenoxylate-atropine (Lomotil), may make the problem worse. Check with a physician before taking any medicine for diarrhea caused by taking cephalosporins.

Birth control pills may not work properly when taken at the same time as cephalosporins. To prevent pregnancy, use other methods of birth control in addition to the pills while taking cephalosporins.

Taking cephalosporins with certain other drugs may increase the risk of excess bleeding. Among the drugs that may have this effect when taken with cephalosporins are:

  • Blood thinning drugs (anticoagulants) such as warfarin (Coumadin)
  • Blood viscosity reducing medicines such as pentoxifylline (Trental)
  • The antiseizure medicines divalproex (Depakote) and valproic acid (Depakene).

Cephalosporins may also interact with other medicines. When this happens, the effects of one or both of the drugs may change or the risk of side effects may be greater. Anyone who takes cephalosporins should let the physician know all other medicines he or she is taking.

Key Terms

Bronchitis
Inflammation of the air passages of the lungs.
Colitis
Inflammation of the colon (large bowel).
Gonorrhea
A sexually transmitted disease (STD) that causes infection in the genital organs and may cause disease in other parts of the body.
Inflammation
Pain, redness, swelling, and heat that usually develop in response to injury or illness.
Phenylketonuria
(PKU) A genetic disorder in which the body lacks an important enzyme. If untreated, the disorder can lead to brain damage and mental retardation.
Pneumonia
A disease in which the lungs become inflamed. Pneumonia may be caused by bacteria, viruses, or other organisms, or by physical or chemical irritants.
Sexually transmitted disease
A disease that is passed from one person to another through sexual intercourse or other intimate sexual contact. Also called STD.
Staph infection
Infection with staphylococcus bacteria. These bacteria can infect any part of the body.
Strep throat
A sore throat caused by infection with bacteria. Symptoms include sore throat, chills, fever, and swollen lymph nodes in the neck.
Tonsillitis
Inflammation of a tonsil -- a small mass of tissue in the throat.

Further Reading

Gale Encyclopedia of Medicine. Gale Research, 1999.

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