Drug: Cefadroxil

Cefadroxil (cefadroxil hemihydrate), USP (hemihydrate) is a semisynthetic cephalosporin antibiotic intended for oral administration. It is white to off-white crystalline powder. It is slightly soluble in water and it is acid-stable. It is chemically designated as 5-Thia-1-azabicyclo [4.2.0] oct-2-ene-2-carboxylic acid, 7-[[amino (4-hydroxyphenyl) acetyl] amino]-3- methyl-8-oxo-, hemihydrate, [6R-[6α, 7β (R*)]]-. It has the formula C16H17N3O5S•½ H2O and the molecular weight of 372.39. It has the following structural formula: Each film coated tablet for oral administration contains Cefadroxil (cefadroxil hemihydrate) hemihydrate equivalent to 1 gram cefadroxil (cefadroxil hemihydrate). In addition, each tablet contains the following inactive ingredients: croscarmellose sodium, hypromellose, magnesium stearate, microcrystalline cellulose, monosodium citrate, polyethylene glycol, talc and titanium dioxide. Each capsule for oral administration contains Cefadroxil (cefadroxil hemihydrate) hemihydrate equivalent to 500 mg cefadroxil (cefadroxil hemihydrate). In addition, each capsule contains the following inactive ingredients: magnesium stearate and pregelatinized starch. The capsule shell also contains D&C yellow no. 10, FD&C blue no. 1, FD&C red no. 40, gelatin and titanium dioxide. The imprinting ink also contains D&C yellow no. 10 aluminum lake, FD&C blue no. 1 aluminum lake, FD&C blue no. 2 aluminum lake, FD&C red no. 40 aluminum lake, pharmaceutical glaze, propylene glycol and synthetic black iron oxide.

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Gastrointestinal Onset of pseudomembranous colitis symptoms may occur during or after antibiotic treatment (see WARNINGS). Dyspepsia, nausea and vomiting have been reported rarely. Diarrhea has also occurred. Hypersensitivity Allergies (in the form of rash, urticaria, angioedema, and pruritus) have been observed. These reactions usually subsided upon discontinuation of the drug. Anaphylaxis has also been reported. Other Other reactions have included hepatic dysfunction including cholestasis and elevations in serum transaminase, genital pruritus, genital moniliasis, vaginitis, moderate transient neutropenia, fever. Agranulocytosis, thrombocytopenia,idiosyncratic hepatic failure, erythema multiforme, Stevens-Johnson syndrome, serum sickness, and arthralgia have been rarely reported. In addition to the adverse reactions listed above which have been observed in patients treated with cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) , the following adverse reactions and altered laboratory tests have been reported for cephalosporin-class antibiotics: Toxic epidermal necrolysis, abdominal pain, superinfection, renal dysfunction, toxic nephropathy, hepatic dysfunction including cholestasis, aplastic anemia, hemolytic anemia, hemorrhage, prolonged prothrombin time, positive Coombs’ test, increased BUN, increased creatinine, elevated alkaline phosphatase, elevated aspartate aminotransferase (AST), elevated alanine aminotransferase (ALT), elevated bilirubin, elevated LDH, eosinophilia, pancytopenia, neutropenia. Several cephalosporins have been implicated in triggering seizures, particularly in patients with renal impairment, when the dosage was not reduced (see DOSAGE AND ADMINISTRATION and OVERDOSAGE). If seizures associated with drug therapy occur, the drug should be discontinued. Anticonvulsant therapy can be given if clinically indicated. Read the Cefadroxil (cefadroxil hemihydrate) Side Effects Center for a complete guide to possible side effectsLearn More »

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Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) is acid-stable and may be administered orally without regard to meals. Administration with food may be helpful in diminishing potential gastrointestinal complaints occasionally associated with oral cephalosporin therapy. Adults Urinary Tract Infections: For uncomplicated lower urinary tract infections (i.e., cystitis) the usual dosage is 1 or 2 g per day in single (q.d.) or divided doses (b.i.d). For all other urinary tract infections the usual dosage is 2 g per day in divided doses (b.i.d). Skin and Skin Structure Infections: For skin and skin structure infections the usual dosage is 1 g per day in single (q.d.) or divided doses (b.i.d). Pharyngitis and Tonsillitis: Treatment of group A beta-hemolytic streptococcal pharyngitis and tonsillitis - 1 g per day in single (q.d.) or divided doses (b.i.d) for 10 days. Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) oral suspension may be more suitable for pediatric patients Children For urinary tract infections, the recommended daily dosage for children is 30 mg/kg/day in divided doses every 12 hours. For pharyngitis, tonsillitis, and impetigo, the recommended daily dosage for children is 30 mg/kg/day in a single dose or in equally divided doses every 12 hours. For other skin and skin structure infections, the recommended daily dosage is 30 mg/kg/day in equally divided doses every 12 hours. In the treatment of beta-hemolytic streptococcal infections, a therapeutic dosage of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) should be administered for at least 10 days. Renal Impairment In patients with renal impairment, the dosage of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) should be adjusted according to creatinine clearance rates to prevent drug accumulation. The following schedule is suggested. In adults, the initial dose is 1000 mg of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) and the maintenance dose (based on the creatinine clearance rate [mL/min/1.73 M2]) is 500 mg at the time intervals listed below. Creatinine Clearances Dosage Interval 0 to 10 mL/min 36 hours 10 to 25 mL/min 24 hours 25 to 50 mL/min 12 hours Patients with creatinine clearance rates over 50 mL/min may be treated as if they were patients having normal renal function

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Drug /Laboratory Test Interactions Positive direct Coombs’ tests have been reported during treatment with the cephalosporin antibiotics. In hematologic studies or in transfusion cross-matching procedures when antiglobulin tests are performed on the minor side or in Coombs’ testing of newborns whose mothers have received cephalosporin antibiotics before parturition, it should be recognized that a positive Coombs’ test may be due to the drug.Last reviewed on RxList: 7/31/2007
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

To reduce the development of drug-resistant bacteria and maintain the effectiveness of Cefadroxil (cefadroxil hemihydrate) Tablets and Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) Capsules and other antibacterial drugs, Cefadroxil (cefadroxil hemihydrate) Tablets and Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) capsules should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy. Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) is indicated for the treatment of patients with infection caused by susceptible strains of the designated organisms in the following diseases: Urinary tract infections caused by E. coli, P. mirabilis, and Klebsiella species. Skin and skin structure infections caused by staphylococci and/or streptococci. Pharyngitis and/or tonsillitis caused by Streptococcus pyogenes (Group A beta-hemolytic Streptococci). Note: Only penicillin by the intramuscular route of administration has been shown to be effective in the prophylaxis of rheumatic fever. Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) is generally effective in the eradication of streptococci from the oropharynx. However, data establishing the efficacy of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) for the prophylaxis of subsequent rheumatic fever are not available. Note: Culture and susceptibility tests should be initiated prior to and during therapy. Renal function studies should be performed when indicated.

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Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) is contraindicated in patients with known allergy to the cephalosporin group of antibioticsLast reviewed on RxList: 7/31/2007
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

A study of children under six years of age suggested that ingestion of less than 250 mg/kg of cephalosporins is not associated with significant outcomes. No action is required other than general support and observation. For amounts greater than 250 mg/kg, induce gastric emptying. In five anuric patients, it was demonstrated that an average of 63% of a 1 g oral dose is extracted from the body during a 6 to 8 hour hemodialysis session.

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Cefadroxil tablets contain cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) hemihydrate equivalent to 1 gram of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) and are supplied as follows: Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) 1 gram Tablets: white, oblong, biconvex film-coated tablets, debossed on one side with ‘CF 512’ and scored on the other side. (50s) NDC 63304-512-50 (100s) NDC 63304-512-01 (unit-dose 100s) NDC 63304-512-80 Cefadroxil capsules contain cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) hemihydrate equivalent to 500 mg of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) and are supplied as follows: Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) 500 mg Capsules: white opaque body and brown opaque cap imprinted with ‘C’ on the cap and ‘582’ on the body. (50s) NDC 63304-582-50 (100s) NDC 63304-582-01 Dispense in a tight container as defined in the USP. Store at 20 - 25° C (68 - 77° F). (See USP Controlled Room Temperature).

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General: Prescribing Cefadroxil (cefadroxil hemihydrate) Tablets and Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) Capsules in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria. Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) should be used with caution in the presence of markedly impaired renal function (creatinine clearance rate of less than 50 mL/min/1.73 M2) (See DOSAGE AND ADMINISTRATION). In patients with known or suspected renal impairment, careful clinical observation and appropriate laboratory studies should be made prior to and during therapy. Prolonged use of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) may result in the overgrowth of nonsusceptible organisms. Careful observation of the patient is essential. If superinfection occurs during therapy, appropriate measures should be taken. Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) should be prescribed with caution in individuals with history of gastrointestinal disease, particularly colitis. Carcinogenesis, Mutagenesis, and Impairment of Fertility No long-term studies have been performed to determine carcinogenic potential. No genetic toxicity tests have been performed. Pregnancy: Pregnancy Category B Reproduction studies have been performed in mice and rats at doses up to 11 times the human dose and have revealed no evidence of impaired fertility or harm to the fetus due to cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) . There are, however, no adequate and well controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed. Labor and Delivery Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) has not been studied for use during labor and delivery. Treatment should only be given if clearly needed. Nursing Mothers Caution should be exercised when cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) is administered to a nursing mother. Geriatric Use Of approximately 650 patients who received cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) for the treatment of urinary tract infections in three clinical trials, 28% were 60 years and older, while 16% were 70 years and older. Of approximately 1000 patients who received cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) for the treatment of skin and skin structure infection in 14 clinical trials, 12% were 60 years and older while 4% were 70 years and over. No overall differences in safety were observed between the elderly patients in these studies and younger patients. Clinical studies of cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) for the treatment for pharyngitis or tonsillitis did not include sufficient numbers of patients 65 years and older to determine whether they respond differently from younger patients. Other reported clinical experience with cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) has not identified differences in responses between elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out. Cefadroxil (cefadroxil (cefadroxil hemihydrate) hemihydrate) is substantially excreted by the kidney, and dosage adjustment is indicated for patients with renal impairment (see DOSAGE AND ADMINISTRATION: Renal Impairment). Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function. Pediatric Use (See DOSAGE AND ADMINISTRATION).Last reviewed on RxList: 7/31/2007
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

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