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Serious and occasionally fatal hypersensitivity (anaphylactic) reactions have been reported in patients on oral penicillin therapy. Although anaphylaxis is more frequent following parenteral therapy, it has occurred in patients on oral penicillins. These reactions are more apt to occur in individuals with a history of penicillin hypersensitivity and/or a history of sensitivity to multiple allergens.
There have been reports of individuals with a history of penicillin hypersensitivity who have experienced severe hypersensitivity reactions when treated with a cephalosporin, and vice versa. Before initiating therapy with a penicillin, careful inquiry should be made concerning previous hypersensitivity reactions to penicillins, cephalosporins, or other allergens. If an allergic reaction occurs, the drug should be discontinued and the appropriate therapy instituted.
SERIOUS ANAPHYLACTOID REACTIONS REQUIRE IMMEDIATE EMERGENCY TREATMENT WITH EPINEPHRINE. OXYGEN, INTRAVENOUS STEROIDS AND AIRWAY MANAGEMENT, INCLUDING INTUBATION, SHOULD ALSO BE ADMINISTERED AS INDICATED.
Clostridium difficile associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including GEOCILLIN (carbenicillin indanyl sodium), and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile.
C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin producing strains of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibiotic use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.
If CDAD is suspected or confirmed, ongoing antibiotic use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibiotic treatment of C. difficile, and surgical evaluation should be instituted as clinically indicated.
General: As with any penicillin preparation, an allergic response, including anaphylaxis, may occur particularly in a hypersensitive individual.
Long term use of Geocillin (carbenicillin indanyl sodium) may result in the overgrowth of nonsusceptible organisms. If superinfection occurs during therapy, appropriate measures should be taken.
Since carbenicillin is primarily excreted by the kidney, patients with severe renal impairment (creatinine clearance of less than 10 ml/min) will not achieve therapeutic urine levels of carbenicillin.
In patients with creatinine clearance of 10-20 ml/min it may be necessary to adjust dosage to prevent accumulation of drug.
Prescribing Geocillin (carbenicillin indanyl sodium) in the absence of 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.
Carcinogenesis, Mutagenesis, Impairment of Fertility: There are no long-term animal or human studies to evaluate carcinogenic potential. Rats fed 250-1000 mg/kg/day for 18 months developed mild liver pathology (e.g., bile duct hyperplasia) at all dose levels, but there was no evidence of drug-related neoplasia. Geocillin (carbenicillin indanyl sodium) administered at daily doses ranging to 1000 mg/kg had no apparent effect on the fertility or reproductive performance of rats.
Pregnancy Category B: Reproduction studies have been performed at dose levels of 1000 or 500 mg/kg in rats, 200 mg/kg in mice, and at 500 mg/kg in monkeys with no harm to fetus due to Geocillin (carbenicillin indanyl sodium) . 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: It is not known whether the use of Geocillin (carbenicillin indanyl sodium) in humans during labor or delivery has immediate or delayed adverse effects on the fetus, prolongs the duration of labor, or increases the likelihood that forceps delivery or other obstetrical intervention or resuscitation of the newborn will be necessary.
Nursing Mothers: Carbenicillin class antibiotics are excreted in milk although the amounts excreted are unknown; therefore, caution should be exercised if administered to a nursing woman.
Pediatric Use: Since only limited clinical data is available to date in children, the safety of Geocillin (carbenicillin indanyl sodium) administration in this age group has not yet been established.This monograph has been modified to include the generic and brand name in many instances.
Last reviewed on RxList: 4/8/2008
Additional Geocillin Information
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