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The relative safety of imipenem/cilastatin for 3470 patients was reviewed to see if the safety profile was similar to that seen for the first 1723 patients treated. The most common clinical adverse experiences were local ones related to the site of intravenous infusion. Gastrointestinal adverse experiences included nausea, vomiting, or diarrhoea. The frequency of pseudomembranous colitis was low (0 X 1%). The most common central nervous system abnormality was seizure. The most common background factor was central nervous system abnormality including prior history of seizure. Dermatological adverse experiences included rash, pruritus and urticaria. Bleeding and decreased renal function were uncommon. The most common laboratory changes included transient increased liver function values, eosinophilia, positive Coombs' test (not associated with haemolysis) and increased platelets. The current clinical and laboratory safety data are similar to those obtained in the early part of the clinical trials.
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PMID:The safety profile of imipenem/cilastatin: worldwide clinical experience based on 3470 patients. 346 94

This review summarizes adverse reactions probably or possibly attributable to oral ciprofloxacin therapy in worldwide clinical experience involving over 6500 patients. In Europe and Japan the overall incidence of adverse reactions amongst patients receiving ciprofloxacin is reported to be 3.0% and 6.5%, respectively. An increased incidence (13.4%) has been reported from the U.S.A., possibly relating to the use of higher dosages. Very few reactions have necessitated withdrawal of treatment. The most common adverse effects involve the gastro-intestinal system (2-8% of patients treated) and usually comprise nausea, vomiting, diarrhoea and abdominal discomfort. CNS effects are seen in 1-4% of patients but are usually minor dizziness or mild headache only. Hypersensitivity reactions, most commonly skin rashes or pruritus, affect about 1% of patients. There is little evidence of significant haematological or biochemical toxicity, other than a few reports of transient neutropenia and the finding, in a minority of clinical studies, of equally transient, usually trivial and invariably reversible elevations of serum aminotransferases. Serious, ciprofloxacin-related toxicity has been observed in only three patients: one who developed pseudomembranous colitis, another who developed interstitial nephritis and a third who had a grand-mal convulsion during concomitant administration of theophylline. Ciprofloxacin appears to have an excellent safety profile.
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PMID:Ciprofloxacin: an overview of adverse experiences. 354 45

A middle-aged man presented with diarrhea, fever, and leukocytosis 7 days after discontinuation of clindamycin therapy for a urinary tract infection. Proctosigmoidoscopy showed adherent, raised plaques studding the bowel wall consistent with antibiotic-associated pseudomembranous colitis. Vancomycin therapy was begun, but progressive abdominal distension, nausea, vomiting, and loss of bowel sounds occurred. Serial abdominal radiographs demonstrated colonic wall edema without dilatation. Subtotal colectomy was performed and resulted in complete resolution of symptoms.
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PMID:Fulminant colitis complicating antibiotic-associated pseudomembranous colitis: case report and review of the clinical manifestations and treatment. 355 86

A 76-yr-old woman complained of right lower quadrant abdominal pain, nausea, and fever. There was no history of antibiotic therapy or preceding diarrhea. At laparotomy, a cecal lesion simulating a tumor was found with an otherwise normal colon. Right hemicolectomy was performed. Pathological examination showed pseudomembranous colitis confined to the cecum. It is suggested that pseudomembranous colitis unrelated to prior exposure to antimicrobial agents can occur without diarrhea, and may be a localized process mimicking colonic carcinoma.
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PMID:Localized pseudomembranous colitis simulating carcinoma of the cecum. 367 1

Monotherapy of osteomyelitis with the newer broad-spectrum beta-lactam antibiotics has become attractive because of the efficacy, safety, and cost of these antibiotics when compared with conventional combination therapy. Imipenem/cilastatin is a recent and promising addition to this antibiotic family. Experience with imipenem/cilastatin and that reported for cefotaxime, ceftazidime, and ceftizoxime in the treatment of biopsy-proved osteomyelitis was compared, using data from published reports from five centers. Two hundred forty-three patients were evaluable: 34 were treated with imipenem/cilastatin, 84 with cefotaxime, 122 with ceftazidime, and 33 with ceftizoxime. Staphylococcus aureus was isolated by 80 bone cultures and was the most common single species encountered. There were 75 isolates of Pseudomonas aeruginosa, 113 mixed Enterobacteriaceae species, 115 mixed gram-positive and -negative isolates of miscellaneous species, and 30 anerobic isolates. Polymicrobial infection was present in 101 cases (41.6 percent). Failure rates were similarly low in all groups (10 to 30 percent). However, resistance developed during therapy in all groups with P. aeruginosa. Side effects were predictably few, but reversible neutropenia, pseudomembranous colitis due to Clostridium difficile, and nausea required therapy to be discontinued in seven patients. Imipenem/cilastatin should prove to be a very effective and relatively safe single agent for treatment of osteomyelitis.
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PMID:Role for newer beta-lactam antibiotics in treatment of osteomyelitis. 385 12

Imipenem-cilastatin was given in doses of 1 g intravenously every 6 h to 31 patients. Twenty-five patients, with 27 infections, were clinically evaluable and received 20 to 210 g of imipenem for a duration of 5 to 56 days (average 16.3 days). Infections included seven cases of osteomyelitis, seven of bacteremia, five of cellulitis, two of pneumonia, three of pelvic cellulitis, two of intraabdominal abscess, and one each of empyema, mediastinitis, and endometritis. Fifty-five percent of the infections were caused by gram-negative bacilli, 33% were due to gram-positive organisms, and 10% were caused by anaerobes. Twenty-two patients (81%) were cured, three improved, one relapsed, and one became superinfected with a resistant organism. In 5 of 11 cases with Pseudomonas aeruginosa, the imipenem MIC for organisms isolated by the end of treatment was higher than it was initially, raising concern that imipenem should not be used alone to treat Pseudomonas aeruginosa infections. Twenty-one patients had no adverse reaction; of the remaining 10 patients, 4 had nausea, 1 had urticaria, and 6 had mild abnormalities in hepatic function; three episodes of diarrhea included two with Clostridium difficile toxin in stool and one with pseudomembranous colitis, as determined by sigmoidoscopy. Levels of creatinine, hemoglobin, leukocytes, platelets, prothrombin, and urine components were unchanged. Imipenem-cilastatin is a clinically effective antibiotic with freedom from nephrotoxicity and hematological abnormalities in the large doses used in this study.
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PMID:Safety and efficacy of high-dose treatment with imipenem-cilastatin in seriously ill patients. 386 Jan 87

Campylobacter fetus subspecies jejuni was isolated fom the feces of 63 (3.2%) of the 1,953 patients who had stools cultured at the Mayo Clinic in 1979. In contrast, Salmonella and Shigella combined were isolated from 31 (1.6%) patients. Two patients had double infections with Salmonella species and C. fetus subsp jejuni. Three patients had no diarrhea at the time of stool culture. One patient, who had chronic lymphocytic leukemia, had both blood and stool cultures positive for C. fetus subsp jejuni. There was a seasonal incidence that peaked in July when 7.8% of all patients who had stools cultured had C. fetus subsp jejuni isolated. Thirteen cases occurred in children 5 years of age and younger and 29 cases occurred between the ages of 15 and 30 years. Clinical features often included a prodrome of malaise, which preceded the onset of abdominal cramps, diarrhea, anorexia, fever, nausea, and vomiting. Grossly bloody diarrhea occurred in 33 patients, and massive intestinal bleeding occurred in 1 patient as a late complication after diarrhea had resolved. Transient splenomegaly was attributed to C. fetus subsp jejuni on one occasion. Proctoscopic findings may be similar to those seen in inflammatory bowel disease or pseudomembranous colitis. Three patients were referred to this institution with newly diagnosed chronic ulcerative colitis, and one patient was referred with newly diagnosed Crohn's disease. C. fetus subsp jejuni was isolated from their stools, and the diagnosis of inflammatory bowel disease was subsequently dropped. A selected review of cases illustrates the variety of gastrointestinal manifestations seen with this organism.
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PMID:Diarrhea due to Campylobacter fetus subspecies jejuni. A clinical review of 63 cases. 725 3

For about 6 years after the marketing of oral formulations of fosfomycin calcium (FOM-Ca) in December, 1980, we collected the data on 35,481 cases and analyzed it regarding safety. Primary side-effects consisted mainly in gastrointestinal disturbances, damage to skin and adnexa, liver and bile duct disorders. Specifically, diarrhea, nausea, abdominal pain, anorexia, eruption and increased serum transaminase were frequent. Serious and newly detected side-effects after marketing were pseudomembranous colitis and melena, one case each. As for the oral administration of FOM-Ca to 83 patients hypertensive to beta-lactams, gastrointestinal side-effects were seen but none of them developed hypersensitivity, an allergic reaction.
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PMID:Analysis of oral fosfomycin calcium (Fosmicin) side-effects after marketing. 845 80

1. The safety in everyday clinical usage of three 4-quinolone antibiotics, (ciprofloxacin, norfloxacin and ofloxacin), was compared with similar data for azithromycin and cefixime, each agent being examined by Prescription-Event Monitoring (PEM) during the early post-marketing period. 2. In PEM the exposure data are derived from general practitioner prescriptions confidentially provided by the Prescription Pricing Authority. Outcome data are provided by questionnaires (green forms) on which the prescribing medical practitioner records event data. When necessary, further information is obtained from a number of sources which include follow-up of all pregnancies and the patients' life-time medical record. 3. The main outcome measures were demographic information, including the patient's date of birth and sex; the indication for prescribing the drug being monitored; the reason for stopping treatment; the start and stop dates of treatment and the events recorded during and after treatment. 4. The final cohort for each of the five antibiotics exceeded 11000 patients. The only event significantly related to the use of all five antibiotics was nausea/vomiting. This was also the most frequent adverse event causing treatment to be discontinued with norfloxacin, ofloxacin and azithromycin (relevant information was not requested in the studies of ciprofloxacin and cefixime). Vaginal candidiasis was significantly more frequently associated with the use of the three 4-quinolones than with azithromycin and cefixime but it was frequently delayed until the week or two after the cessation of therapy. Within each event, as recorded in these studies, the highest event rates (the number of events per 1000 patients) in the week following the start of therapy were: 9.2 for diarrhoea with cefixime; 4.9 for nausea/vomiting with ofloxacin; 2.4 for rash with azithromycin; 2.2 for abdominal pain with norfloxacin; 1.5 for headache/migraine with ofloxacin; 1.4 for malaise/lassitude with ofloxacin; 1.2 for dizziness with norfloxacin. Uncommon events (reported in less than 1:1000 patients) included rare cases of allergic phenomena, convulsions and pseudomembranous colitis. There were no reports of tendinitis, tenosynovitis or tendon rupture in children but tendon disorders were reported in the two months following the start of treatment in 20 adults. A total of 307 pregnancies were reported. Thirty-eight of the 55 women who received these drugs during the first trimester of pregnancy gave birth to healthy babies. No congenital abnormalities were reported. Apart from one case of unconfirmed pseudomembranous colitis, none of the other 2468 deaths that occurred in these studies was attributed to the antibiotics. 5. These five antibiotics are acceptably safe antimicrobial agents when used in general medical practice. PEM is an effective method for monitoring the safety of recently introduced antimicrobial agents.
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PMID:A comparison of ciprofloxacin, norfloxacin, ofloxacin, azithromycin and cefixime examined by observational cohort studies. 873 Sep 72

Patients with serious staphylococcal infections, e.g. endocarditis and osteomyelitis, need prompt and prolonged parenteral antibiotic treatment to ensure eradication of the causative pathogen. The major cost in the treatment of these infections is the long period of hospitalisation required for the administration of intravenous antibiotics. To shorten the hospitalisation period, outpatient treatment can be given to some patients. In this study, patients with acute exacerbations of chronic osteomyelitis (n = 44) or endocarditis (n = 10) were treated with intravenous teicoplanin. The pathogens were Staphylococcus aureus (n = 41, 13 of which were methicillin resistant) and coagulase-negative staphylococci (n = 13, one of which was methicillin resistant). After a mean loading dose of 15 mg/kg for 3 to 10 days, patients received teicoplanin 3 times a week at a dose (mean 15 mg/kg) individualised to achieve serum trough concentrations of approximately 10 mg/L for osteomyelitis and 20 mg/L for endocarditis. Treatment duration ranged from 28 to 150 (mean 62) days for patients with osteomyelitis and from 28 to 88 (mean 49) days for patients with endocarditis. 37 (84%) patients with osteomyelitis and 8 (80%) patients with endocarditis were treated successfully. Adverse events were observed in 9 patients and included rash (n = 3), thrombocytopenia (n = 3), and drug fever, pseudomembranous colitis, nausea, leucopenia and transient hearing impairment (one patient each). In conclusion, this study demonstrates that teicoplanin can be administered successfully in an outpatient setting according to a 3-times weekly schedule for the treatment of patients with staphylococcal osteomyelitis and endocarditis.
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PMID:Management of serious staphylococcal infections in the outpatient setting. 947 78


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