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1.
Antimicrob Agents Chemother ; 52(8): 2831-5, 2008 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-18505852

RESUMO

Tibotec Medicinal Compound 207 (TMC207) is a novel diarylquinoline with a unique mode of action that targets mycobacterial ATP synthase. TMC207 exhibits high in vitro activity against mycobacterial strains either susceptible or resistant to all first-line and many second-line drugs, including fluoroquinolones, and has shown exceptional in vivo activity against several mycobacterial species in different animal models. In this early bactericidal activity study, 75 treatment-naïve patients with smear-positive pulmonary tuberculosis were randomized to once-daily oral TMC207 (25 mg, 100 mg, or 400 mg), 600 mg rifampin (RIF), or 300 mg isoniazid (INH) for 7 days. Sixteen-hour overnight sputum collected at baseline and on each treatment day was plated in serial dilutions on selective agar plates. The bactericidal activity was expressed as the log(10) decrease in CFU/ml sputum/day. Pharmacokinetic sampling was performed on day 7 of TMC207 administration up to 24 h postdose. The decreases in log(10) CFU counts (+/- standard deviation) from baseline to day 7 were 0.04 +/- 0.46 for 25 mg TMC207 (n = 14), 0.26 +/- 0.64 for 100 mg TMC207 (n = 14), 0.77 +/- 0.58 for 400 mg TMC207 (n = 14), 1.88 +/- 0.74 for INH (n = 11), and 1.70 +/- 0.71 for RIF (n = 14). Significant bactericidal activity of 400 mg TMC207 was observed from day 4 onward and was similar in magnitude to those of INH and RIF over the same period. The pharmacokinetics of TMC207 were linear across the dose range. In summary, TMC207 demonstrated bactericidal activity with a delayed onset and was well tolerated, and no study drug-related serious adverse events occurred.


Assuntos
Antituberculosos/uso terapêutico , Mycobacterium tuberculosis/efeitos dos fármacos , Quinolinas/uso terapêutico , Tuberculose Pulmonar/tratamento farmacológico , Administração Oral , Adolescente , Adulto , Antituberculosos/administração & dosagem , Antituberculosos/farmacocinética , Área Sob a Curva , Diarilquinolinas , Relação Dose-Resposta a Droga , Feminino , Humanos , Masculino , Taxa de Depuração Metabólica , Pessoa de Meia-Idade , Quinolinas/administração & dosagem , Quinolinas/farmacocinética , Escarro/efeitos dos fármacos , Escarro/microbiologia , Resultado do Tratamento , Tuberculose Pulmonar/microbiologia
2.
Antimicrob Agents Chemother ; 50(12): 4096-102, 2006 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16982783

RESUMO

Originally, itraconazole for parenteral administration was licensed in a 40% hydroxypropyl-beta-cyclodextrin (HPBCD) solution for intravenous administration. A novel formulation, the NanoCrystal formulation (NCF), was prepared. NCF consists of drug particles of approximately 200 to 300 nm. The pharmacokinetics of itraconazole and its hydroxy metabolite in healthy subjects were evaluated after single and multiple doses of itraconazole as NCF. In the single-ascending-dose (SAD) study, itraconazole doses were planned to range from 50 to 500 mg, while in the multiple-ascending-dose (MAD) study, itraconazole doses of 100, 200, and 300 mg as NCF were studied, as was one dose level (200 mg) as an HBPCD solution. Samples were collected in heparinized tubes at various time points and were analyzed by high-performance liquid chromatography to allow full pharmacokinetic analysis both after the first dose and on day 7. The results of both the SAD and the MAD studies indicated that there was a dose dependency in the half-life of itraconazole from the novel formulation, increasing from 44 h (100 mg) to more than 150 h (300 mg) once steady state was achieved. Similar dose-dependent effects were observed for the hydroxy metabolite. The areas under the concentration-time curves for itraconazole and hydroxyitraconazole were also dose dependent. The pharmacokinetic profiles after 200-mg doses of itraconazole as NCF and HPBCD formulations were comparable with respect to the terminal half-life, both after a single dose and at steady state. NCF may provide an alternative to the HPBCD solution for the further optimization of antifungal treatment with itraconazole.


Assuntos
Antifúngicos/farmacocinética , Itraconazol/análogos & derivados , Itraconazol/farmacocinética , Adulto , Antifúngicos/administração & dosagem , Área Sob a Curva , Química Farmacêutica , Cromatografia Líquida de Alta Pressão , Relação Dose-Resposta a Droga , Feminino , Meia-Vida , Humanos , Itraconazol/administração & dosagem , Masculino , Pessoa de Meia-Idade , Nanopartículas
3.
HIV Med ; 2(2): 78-83, 2001 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-11737382

RESUMO

OBJECTIVES: To determine whether systemic or deep fungal infections can be prevented, a double-blind, placebo-controlled, phase III trial of itraconazole prophylaxis was undertaken in HIV-infected patients. METHODS: HIV-1 infected patients with CD4 counts < 300 cells/microL were treated with itraconazole (200 mg per day) or matching placebo and followed for 2 years. Development of deep fungal infections, episodes of mucocutaneous candidiasis, change in CD4 count, survival and safety data were collected at each study visit. RESULTS: Three hundred and seventy-four patients received study medication, 187 were given itraconazole and 187 matching placebo. Time to development of deep fungal infection did not differ between groups, in an intention to treat analysis. Low CD4 cell count and prior use of Pneumocystis carinii pneumonia (PCP) prophylaxis were significantly associated with a more rapid development of deep fungal infection (P = 0.044 and 0.017, respectively). Itraconazole treatment significantly reduced the incidence of oral candidosis (25% vs. 48% P < 0.001) and time to development of oral candidosis (508 vs. 413 days, P < 0.001) but not the number of deep fungal infections (11 vs. 13). Survival did not differ significantly between groups (nine vs. 14 deaths). CD4 counts decreased significantly over time in both study arms. Adverse events did not differ between groups; 20% vs. 23% stopped study medication due to an adverse experience. CONCLUSIONS: Although itraconazole prophylaxis significantly reduced the number and time to development of oral candidosis, too few episodes of deep fungal infection were noted to determine whether itraconazole prophylaxis was effective for this condition. Chronic itraconazole treatment is well tolerated in HIV-infected patients with marked immunodeficiency.


Assuntos
Infecções Oportunistas Relacionadas com a AIDS/prevenção & controle , Antifúngicos/uso terapêutico , Infecções por HIV/complicações , HIV-1 , Itraconazol/uso terapêutico , Micoses/prevenção & controle , Infecções Oportunistas Relacionadas com a AIDS/microbiologia , Adulto , Antifúngicos/efeitos adversos , Contagem de Linfócito CD4 , Candidíase Bucal/epidemiologia , Candidíase Bucal/prevenção & controle , Método Duplo-Cego , Feminino , Infecções por HIV/imunologia , Humanos , Hospedeiro Imunocomprometido , Itraconazol/efeitos adversos , Masculino , Micoses/epidemiologia , Placebos , Segurança , Análise de Sobrevida , Resultado do Tratamento
4.
Ann Intern Med ; 135(6): 412-22, 2001 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-11560454

RESUMO

BACKGROUND: Amphotericin B deoxycholate is currently the standard empirical antifungal therapy in neutropenic patients with cancer who have persistent fever that does not respond to antibiotic therapy. However, this treatment often causes infusion-related and metabolic toxicities, which may be dose limiting. OBJECTIVE: To compare the efficacy and safety of itraconazole with those of amphotericin B as empirical antifungal therapy. DESIGN: An open randomized, controlled, multicenter trial, powered for equivalence. SETTING: 60 oncology centers in 10 countries. PATIENTS: 384 neutropenic patients with cancer who had persistent fever that did not respond to antibiotic therapy. INTERVENTION: Intravenous amphotericin B or intravenous itraconazole followed by oral itraconazole solution. MEASUREMENTS: Defervescence, breakthrough fungal infection, drug-related adverse events, and death. RESULTS: For itraconazole and amphotericin B, the median duration of therapy was 8.5 and 7 days and the median time to defervescence was 7 and 6 days, respectively. The intention-to-treat efficacy analysis of data from 360 patients showed response rates of 47% and 38% for itraconazole and amphotericin B, respectively (difference, 9.0 percentage points [95% CI, -0.8 to 19.5 percentage points]). Fewer drug-related adverse events occurred in the itraconazole group than the amphotericin B group (5% vs. 54% of patients; P = 0.001), and the rate of withdrawal because of toxicity was significantly lower with itraconazole (19% vs. 38%; P = 0.001). Significantly more amphotericin B recipients had nephrotoxicity (P < 0.001). Breakthrough fungal infections (5 patients in each group) and mortality rates (19 deaths in the itraconazole group and 25 deaths in the amphotericin B group) were similar. Sixty-five patients switched to oral itraconazole solution after receiving the intravenous formulation for a median of 9 days. CONCLUSIONS: Itraconazole and amphotericin B have at least equivalent efficacy as empirical antifungal therapy in neutropenic patients with cancer. However, itraconazole is associated with significantly less toxicity.


Assuntos
Anfotericina B/administração & dosagem , Antifúngicos/administração & dosagem , Ácido Desoxicólico/administração & dosagem , Itraconazol/administração & dosagem , Micoses/tratamento farmacológico , Neoplasias/complicações , Neutropenia/imunologia , Infecções Oportunistas/tratamento farmacológico , Administração Oral , Anfotericina B/efeitos adversos , Antibacterianos/uso terapêutico , Antifúngicos/efeitos adversos , Antineoplásicos/efeitos adversos , Ácido Desoxicólico/efeitos adversos , Combinação de Medicamentos , Febre/etiologia , Humanos , Infusões Intravenosas , Itraconazol/efeitos adversos , Micoses/complicações , Neoplasias/tratamento farmacológico , Infecções Oportunistas/complicações , Fatores de Risco , Falha de Tratamento
5.
Clin Infect Dis ; 33(8): e83-90, 2001 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-11550120

RESUMO

The pharmacokinetics, efficacy, and safety of intravenous (iv) itraconazole (2 days at 400 mg/day, 12 days at 200 mg/day), followed by 12 weeks of oral capsules (400 mg/day) were studied in 31 immunocompromised patients with pulmonary invasive aspergillosis. All patients received iv itraconazole (median duration, 14 days), and 26 then received oral itraconazole (median duration, 78.5 days). After receiving iv itraconazole, concentrations increased rapidly, with trough plasma levels > or =250 ng/mL in 91% of patients and in all patients by day 7. Concentrations > or =500 ng/mL were observed in 64% of patients by day 2. Mean trough concentrations after 2 and 14 days were 670 and 850 ng/mL, respectively. Therapeutic levels were maintained after switching to oral capsules. A complete or partial response was seen at the last on-treatment assessment in 15 (48%) of 31 patients, with 6 (19%) showing stable disease. Itraconazole was well tolerated, with no unexpected effects. Overall iv/oral itraconazole was safe and effective in invasive aspergillosis.


Assuntos
Antifúngicos/administração & dosagem , Aspergilose/tratamento farmacológico , Hospedeiro Imunocomprometido , Itraconazol/administração & dosagem , Pneumopatias Fúngicas/tratamento farmacológico , Infecções Oportunistas Relacionadas com a AIDS/tratamento farmacológico , Infecções Oportunistas Relacionadas com a AIDS/microbiologia , Administração Oral , Adulto , Idoso , Antifúngicos/efeitos adversos , Antifúngicos/farmacocinética , Feminino , Doença Granulomatosa Crônica/complicações , Neoplasias Hematológicas/complicações , Humanos , Injeções Intravenosas , Itraconazol/efeitos adversos , Itraconazol/farmacocinética , Masculino , Pessoa de Meia-Idade
6.
J Antimicrob Chemother ; 48(1): 97-103, 2001 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-11418517

RESUMO

The efficacy and safety of itraconazole oral solution and a combination of amphotericin B capsules plus nystatin oral suspension were compared in the prophylaxis of fungal infections in neutropenic patients. In an open, randomized, multicentre trial, 144 patients received itraconazole oral solution 100 mg bd, and 133 patients received amphotericin B 500 mg tds plus nystatin 2 MU qds. Overall, 65% of itraconazole-treated patients were considered to have had successful prophylaxis, compared with 53% in the polyene group. Proven deep fungal infections occurred in 5% of patients in each group. Fewer patients receiving itraconazole than amphotericin plus nystatin had superficial infections (3 versus 8%; P = 0.066). This trend in favour of itraconazole was seen in patients with profound neutropenia (neutrophil count <0.1 x 10(9) cells/L at least once) or prolonged neutropenia (neutrophil count <1.0 x 10(9) cells/L for >14 days). The median time to prophylactic failure was longer in the itraconazole group (37 days) than in the polyene group (34 days). The number of patients with fungal colonization (nose, sputum, stool) changed more favourably from baseline to endpoint in the itraconazole group than in the polyene group. Both treatments were safe and well tolerated; however, patients receiving amphotericin plus nystatin had a higher incidence of nausea and rash. In conclusion, itraconazole oral solution at doses of 100 mg bd and oral amphotericin B plus nystatin have similar prophylactic efficacy against fungal infections in neutropenic patients. On the basis of reduced incidence of superficial fungal infections, fungal colonization and specific adverse events, itraconazole may be the preferred treatment.


Assuntos
Anfotericina B/administração & dosagem , Antifúngicos/uso terapêutico , Itraconazol/uso terapêutico , Micoses/prevenção & controle , Neoplasias/complicações , Neutropenia/complicações , Nistatina/administração & dosagem , Adulto , Idoso , Anfotericina B/efeitos adversos , Feminino , Humanos , Itraconazol/efeitos adversos , Itraconazol/sangue , Masculino , Pessoa de Meia-Idade
7.
J Clin Pharm Ther ; 26(3): 159-69, 2001 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11422598

RESUMO

Itraconazole is a triazole antifungal agent with a broad spectrum of activity. It is well tolerated and highly efficacious, particularly because its main metabolite, hydroxy-itraconazole, also has considerable antifungal activity. Two new formulations of itraconazole, an oral solution and an intravenous formulation, have recently been developed, which combine lipophilic itraconazole with cyclodextrin. These formulations have improved the solubility of itraconazole, leading to enhanced absorption and bioavailability compared with the original capsule formulation, without having an impact on the tolerability profile of itraconazole. The oral solution and intravenous formulations of itraconazole produce consistent plasma concentrations and are ideal for the treatment of systemic fungal infections in a wide range of patient populations. The additional flexibility offered by the different routes of administration means that itraconazole treatment can be specifically tailored for use in all patients, including children and those requiring intensive care.


Assuntos
Antifúngicos/farmacologia , Ciclodextrinas/química , Itraconazol/farmacologia , Micoses/tratamento farmacológico , Administração Oral , Antifúngicos/administração & dosagem , Antifúngicos/farmacocinética , Disponibilidade Biológica , Transplante de Medula Óssea , Criança , Cuidados Críticos , Ciclodextrinas/farmacologia , Interações Medicamentosas , Infecções por HIV/tratamento farmacológico , Humanos , Infusões Intravenosas , Itraconazol/administração & dosagem , Itraconazol/farmacocinética , Estrutura Molecular
8.
Antimicrob Agents Chemother ; 45(3): 981-5, 2001 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-11181397

RESUMO

The pharmacokinetics and safety of an intravenous hydroxypropyl-beta-cyclodextrin solution of itraconazole administered for 7 days followed by itraconazole oral solution administered at 200 mg once or twice daily for 14 days were assessed in 17 patients with hematologic malignancies. Steady-state plasma itraconazole concentrations were reached by 48 h after the start of intravenous treatment. The mean trough plasma itraconazole concentration at the end of the intravenous treatment was 0.54 +/- 0.20 microg/ml. This concentration was not maintained during once-daily oral treatment but increased further in the twice-daily treatment group, with a trough itraconazole concentration of 1.12 +/- 0.73 microg/ml at the end of oral treatment. As expected in the patient population studied, all patients experienced some adverse events (mainly gastrointestinal). Biochemical and hematologic abnormalities were frequent, but no consistent changes occurred. In conclusion, 7 days of intravenous treatment followed by 14 days of twice-daily oral treatment with itraconazole solution enables plasma itraconazole concentrations of at least 0.5 microg/ml to be reached rapidly and to be maintained. The regimen is well tolerated and has a good safety profile.


Assuntos
Neoplasias Hematológicas/metabolismo , Itraconazol/farmacocinética , Administração Oral , Adulto , Antifúngicos/administração & dosagem , Antifúngicos/efeitos adversos , Antifúngicos/farmacocinética , Esquema de Medicação , Feminino , Humanos , Infusões Intravenosas , Itraconazol/administração & dosagem , Itraconazol/efeitos adversos , Masculino , Pessoa de Meia-Idade
9.
Drugs ; 61 Suppl 1: 27-37, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11219548

RESUMO

Itraconazole is a triazole antifungal agent that has a broad spectrum of activity and is well tolerated. Itraconazole is highly efficacious, particularly because its main metabolite, hydroxy-itraconazole, also has considerable antifungal activity. The original capsule formulation of itraconazole may lead to variability in absorption and the plasma concentration. For the treatment of superficial fungal infections, this is not problematical because itraconazole accumulates at the infection site, making consistently high plasma concentrations unnecessary -- a characteristic that has been exploited in the development of a pulse regimen. Because consistent plasma concentrations are critical for the more serious systemic fungal infections, variable absorption of itraconazole from the capsules limits their application. Moreover, underlying disease processes and medical interventions can reduce absorption from the capsules in some patients with systemic fungal infections. To widen the beneficial application of itraconazole to include such patients, an oral solution and an intravenous formulation were developed. These formulations combine lipophilic itraconazole with hydroxypropyl-beta-cyclodextrin, a ring of substituted glucose molecules, which improves the solubility of itraconazole. The enhanced absorption and bioavailability of itraconazole from these new formulations make them ideal for the treatment of systemic fungal infections in a wide range of patient populations. The additional flexibility offered by the different routes of administration also means that itraconazole can be used in patients at high risk, such as children or those requiring intensive care, for whom the capsule formulation may be impractical.


Assuntos
Antifúngicos , Itraconazol , Micoses/tratamento farmacológico , Adulto , Idoso , Antifúngicos/administração & dosagem , Antifúngicos/metabolismo , Antifúngicos/farmacocinética , Antifúngicos/farmacologia , Antifúngicos/uso terapêutico , Área Sob a Curva , Disponibilidade Biológica , Cápsulas , Criança , Humanos , Absorção Intestinal , Itraconazol/administração & dosagem , Itraconazol/metabolismo , Itraconazol/farmacocinética , Itraconazol/farmacologia , Itraconazol/uso terapêutico
10.
Antimicrob Agents Chemother ; 44(7): 1887-93, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10858349

RESUMO

Systemic and superficial fungal infections are a major problem among immunocompromised patients with hematological malignancy. A double-blind, double-placebo, randomized, multicenter trial was performed to compare the efficacy and safety of itraconazole oral solution (2.5 mg/kg of body weight twice a day) with amphotericin B capsules (500 mg orally four times a day) for prophylaxis of systemic and superficial fungal infection. Prophylactic treatment was initiated on the first day of chemotherapy and was continued until the end of the neutropenic period (>0.5 x 10(9) neutrophils/liter) or up to a maximum of 3 days following the end of neutropenia, unless a systemic fungal infection was documented or suspected. The maximum treatment duration was 56 days. In the intent-to-treat population, invasive aspergillosis was noted in 5 (1.8%) of the 281 patients assigned to itraconazole oral solution and in 9 (3.3%) of the 276 patients assigned to oral amphotericin B; of these, 1 and 4 patients died, respectively. Proven systemic fungal infection (including invasive aspergillosis) occurred in 8 patients (2.8%) who received itraconazole, compared with 13 (4.7%) who received oral amphotericin B. Itraconazole significantly reduced the incidence of superficial fungal infections as compared to oral amphotericin B (2 [1%] versus 13 [5%]; P = 0.004). Although the incidences of suspected fungal infection (including fever of unknown origin) were not different between the groups, fewer patients were administered intravenous systemic antifungals (mainly intravenous amphotericin B) in the group receiving itraconazole than in the group receiving oral amphotericin B (114 [41%] versus 132 [48%]; P = 0.066). Adequate plasma itraconazole levels were achieved in about 80% of the patients from 1 week after the start of treatment. In both groups, the trial medication was safe and well tolerated. Prophylactic administration of itraconazole oral solution significantly reduces superficial fungal infection in patients with hematological malignancies and neutropenia. The incidence of proven systemic fungal infections, the number of deaths due to deep fungal infections, and the use of systemic antifungals tended to be lower in the itraconazole-treated group than in the amphotericin B-treated group, without statistical significance. Itraconazole oral solution is a broad-spectrum systemic antifungal agent with prophylactic activity in neutropenic patients, especially for those at high risk of prolonged neutropenia.


Assuntos
Antifúngicos/uso terapêutico , Aspergilose/prevenção & controle , Itraconazol/uso terapêutico , Administração Oral , Adolescente , Adulto , Idoso , Anfotericina B/sangue , Anfotericina B/uso terapêutico , Antifúngicos/efeitos adversos , Antifúngicos/sangue , Aspergilose/etiologia , Aspergilose/metabolismo , Aspergilose/mortalidade , Método Duplo-Cego , Feminino , Neoplasias Hematológicas/complicações , Neoplasias Hematológicas/metabolismo , Humanos , Itraconazol/efeitos adversos , Itraconazol/sangue , Masculino , Pessoa de Meia-Idade , Neutropenia/complicações , Neutropenia/metabolismo
11.
Clin Infect Dis ; 26(6): 1368-73, 1998 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-9636865

RESUMO

This double-blind trial compared the clinical and mycological efficacy and safety of itraconazole oral solution with those of fluconazole capsules in the treatment of oropharyngeal candidiasis in patients with AIDS. A total of 244 patients were enrolled and randomized to one of three groups for treatment with itraconazole oral solution (100 mg twice daily for 7 days or 100 mg once daily for 14 days) or fluconazole capsules (100 mg once daily for 14 days). Among 194 evaluable cases, complete response (clearance of all symptoms and signs) or marked improvement was noted in 54 of 60 patients (90%) receiving once-daily itraconazole and in 65 of 72 fluconazole-treated patients (90%) at the end of treatment; these results were statistically equivalent (P = .0024). Twice-daily itraconazole produced a clinical response in 51 of 62 patients (82%). The groups were equivalent in terms of early relapse (within the 18-day period studied); 37% of patients in the twice-daily itraconazole group, 35% in the once-daily itraconazole group, and 34% in the fluconazole group relapsed. Drug tolerability was comparable between the three groups. These results show that, in the treatment of oropharyngeal candidiasis, itraconazole oral solution and fluconazole capsules at a 100-mg single daily dose for 14 days are equally effective.


Assuntos
Infecções Oportunistas Relacionadas com a AIDS/tratamento farmacológico , Antifúngicos/uso terapêutico , Candidíase Bucal/tratamento farmacológico , Fluconazol/uso terapêutico , Itraconazol/uso terapêutico , Adulto , Antifúngicos/administração & dosagem , Método Duplo-Cego , Feminino , Humanos , Itraconazol/administração & dosagem , Masculino , Pessoa de Meia-Idade
12.
Antimicrob Agents Chemother ; 42(2): 404-8, 1998 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9527794

RESUMO

The safety, tolerability, and pharmacokinetics of an oral solution of itraconazole and its active metabolite hydroxyitraconazole were investigated in an open multicenter study of 26 infants and children aged 6 months to 12 years with documented mucosal fungal infections or at risk for the development of invasive fungal disease. The most frequent underlying illness was acute lymphoblastic leukemia, except in the patients aged 6 months to 2 years, of whom six were liver transplant recipients. The patients were treated with itraconazole at a dosage of 5 mg/kg of body weight once daily for 2 weeks. Blood samples were taken after the first dose, during treatment, and up to 8 days after the last itraconazole dose. On day 1, the mean peak concentrations in plasma after the first and last doses (Cmax) and areas under the concentration-time curve from 0 to 24 h (AUC0-24) for itraconazole and hydroxyitraconazole were lower in the children aged 6 months to 2 years than in children aged 2 to 12 years but were comparable on day 14. The mean AUC0-24-based accumulation factors of itraconazole and hydroxyitraconazole from day 1 to 14 ranged from 3.3 to 8.6 and 2.3 to 11.4, respectively. After 14 days of treatment, Cmax, AUC0-24, and the half-life, respectively, were (mean +/- standard deviation) 571+/-416 ng/ml, 6,930+/-5,830 ng.h/ml, and 47+/-55 h in the children aged 6 months to 2 years; 534+/-431 ng/ml, 7,330+/-5,420 ng.h/ml, and 30.6+/-25.3 h in the children aged 2 to 5 years; and 631+/-358 ng/ml, 8,770+/-5,050 ng.h/ml, and 28.3+/-9.6 h in the children aged 5 to 12 years. There was a tendency to have more frequent low minimum concentrations of the drugs in plasma for both itraconazole and hydroxyitraconazole for the children aged 6 months to 2 years. The oral bioavailability of the solubilizer hydroxypropyl-beta-cyclodextrin was less than 1% in the majority of the patients. In conclusion, an itraconazole oral solution given at 5 mg/kg/day provides potentially therapeutic concentrations in plasma, which are, however, substantially lower than those attained in adult cancer patients, and is well tolerated and safe in infants and children.


Assuntos
Antifúngicos/farmacocinética , Itraconazol/farmacocinética , Administração Oral , Antifúngicos/sangue , Antifúngicos/uso terapêutico , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Itraconazol/análogos & derivados , Itraconazol/sangue , Itraconazol/uso terapêutico , Masculino , Micoses/tratamento farmacológico , Micoses/metabolismo , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/metabolismo
13.
Antimicrob Agents Chemother ; 41(12): 2714-8, 1997 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-9420044

RESUMO

Pharmacokinetics and safety of a hydroxy-beta-propyl solution of itraconazole were assessed in 16 patients in an intensive care unit. On the first 2 days, four 1-h infusions of 200 mg were given at 0, 8, 24, and 32 h. From day 3 to 7, inclusive, a single 1-h infusion of 200 mg of itraconazole was given daily. The intravenous (i.v.) treatment was directly followed by repeated administrations of an oral solution of itraconazole at a dosage of either 200 mg once daily or 200 mg twice daily (b.i.d.). During i.v. treatment, steady-state concentrations of itraconazole and hydroxy-itraconazole in plasma were reached within 48 and 96 h, respectively. At the end of i.v. treatment, mean (+/- standard deviation) itraconazole and hydroxy-itraconazole trough concentrations in plasma were 0.344 +/- 0.140 and 0.605 +/- 0.205 microg/ml, respectively. After the 2-week oral follow-up of 200 mg once daily the mean trough concentration had decreased to 0.245 microg/ml, whereas after 200 mg b.i.d. it increased to 0.369 microg/ml. Diarrhea during oral treatment appeared to be dose related and may be due to the solvent hydroxypropyl-beta-cyclodextrin. More severe laboratory abnormalities were noted during the i.v. than the oral treatment phase, probably related to more severe illness in that period of intensive care, but none proved clinically important. These results suggest that plasma itraconazole levels above 0.250 microg/ml may be achieved and maintained with the 1-week i.v. schedule followed by b.i.d. oral administration, whereas the once-daily oral follow-up seems to be a suboptimal treatment.


Assuntos
Antifúngicos/efeitos adversos , Antifúngicos/sangue , Itraconazol/efeitos adversos , Itraconazol/sangue , beta-Ciclodextrinas , 2-Hidroxipropil-beta-Ciclodextrina , Adolescente , Adulto , Antifúngicos/uso terapêutico , Ciclodextrinas/administração & dosagem , Esquema de Medicação , Feminino , Humanos , Infusões Intravenosas , Unidades de Terapia Intensiva , Itraconazol/análogos & derivados , Itraconazol/uso terapêutico , Masculino , Pessoa de Meia-Idade , Micoses/prevenção & controle , Soluções
14.
Pharmacotherapy ; 16(3): 424-8, 1996.
Artigo em Inglês | MEDLINE | ID: mdl-8726601

RESUMO

STUDY OBJECTIVE: To compare the pharmacokinetics of a single 100-mg oral dose of itraconazole administered as 10 ml of a 10-mg/ml itraconazole solution in hydroxypropyl-beta-cyclodextrin under fasting versus postprandial conditions. DESIGN: Open-label, two-way, randomized, crossover study. SETTING: Janssen Research Foundation, Belgium. PATIENTS: Twelve healthy volunteers. INTERVENTIONS: Blood samples were obtained for pharmacokinetic analyses immediately before dosing and at regular intervals up to 96 hours after each dose. Blood and urine samples were obtained for hematologic, biochemical, and urinary safety analyses at baseline and at the end of the study. MEASUREMENTS AND MAIN RESULTS: The mean peak plasma concentrations of both itraconazole and its active metabolite hydroxy-itraconazole were significantly higher under fasting conditions than under postprandial conditions. The mean times to peak concentration for both the parent compound and its metabolite were significantly shorter under fasting than under nonfasting conditions. The mean areas under the curve (AUC0-infinity and AUC0-24 hrs) were also significantly higher under fasting than under postprandial conditions. CONCLUSIONS: Our findings suggest that the higher bioavailability of this new formulation of itraconazole may be of benefit in seriously ill patients who are not able to ingest adequate quantities of food. The fact that the solution was also well tolerated and was not associated with clinically significant changes in any laboratory value further underscores the potential utility of this dosing form.


Assuntos
Antifúngicos/farmacocinética , Dextrinas/administração & dosagem , Interações Alimento-Droga , Itraconazol/farmacocinética , Adulto , Análise de Variância , Antifúngicos/administração & dosagem , Antifúngicos/sangue , Antifúngicos/urina , Estudos Cross-Over , Formas de Dosagem , Sistemas de Liberação de Medicamentos , Feminino , Humanos , Itraconazol/administração & dosagem , Itraconazol/sangue , Itraconazol/urina , Masculino , Pessoa de Meia-Idade
15.
Int J Antimicrob Agents ; 6(3): 175-81, 1996 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-18611706

RESUMO

Itraconazole is an orally active, broad-spectrum, triazole antifungal agent which has a higher affinity for fungal cytochrome P-450 than ketoconazole but a low affinity for mammalian cytochrome P-450. Itraconazole has a broader spectrum of activity than other azole antifungals and shows interesting pharmacokinetic features in terms of its tissue distribution. These properties have resulted in reduced treatment times for a number of diseases such as vaginal candidiasis, as well as effective oral treatment of several deep mycoses, including aspergillosis and candidiasis. Currently itraconazole is registered in 42 countries for the treatment of systemic fungal infections. Further development is concentrating on antifungal prophylaxis as well as on an oral solution and an intravenous formulation.

17.
Mycoses ; 35(1-2): 1-8, 1992.
Artigo em Inglês | MEDLINE | ID: mdl-1406784

RESUMO

Oral candidosis in neonates and children is a common infection which occurs often during the first few months after birth, but occasionally also in older children with certain predisposing factors. In neonates, oral candidosis is usually benign, although the symptoms of such an acute infection can be disturbing to both the patient and the parents. In older children developing oral candidosis, specific predisposing factors may be present (e.g. immunodeficiency, chemotherapy, etc.). In such cases, the infection may constitute a source for further dissemination, leading to occasionally fatal Candida sepsis or to widespread chronic mucocutaneous candidosis. Treatment modalities to date include drugs with limited or no absorption from the gastrointestinal tract (e.g. nystatin and miconazole) and agents that are absorbed, combining local effect with systemic therapy (e.g. clotrimazole, ketoconazole, itraconazole and fluconazole). Overall, it appears that treatment of neonatal oral candidosis should be performed with non-absorbable drugs, while the systemically active agents should be used primarily if a risk of dissemination exists or if widespread disease is present. In general, side-effects and toxicity are not major causes of concern with non-absorbed or absorbed antifungals in children with oral candidosis, since treatment is usually of relatively short duration. When the systemically active agents are used in premature infants with sub-optimal liver function, the risk of drug-induced liver toxicity may be increased.


Assuntos
Antifúngicos/uso terapêutico , Candidíase Bucal/tratamento farmacológico , Absorção , Antifúngicos/efeitos adversos , Candidíase Bucal/prevenção & controle , Criança , Pré-Escolar , Humanos , Lactente , Recém-Nascido
18.
Eur J Obstet Gynecol Reprod Biol ; 41(3): 231-6, 1991 Oct 08.
Artigo em Inglês | MEDLINE | ID: mdl-1936506

RESUMO

In an open, randomized phase II comparative study, 256 patients with acute vaginal candidosis (less than two episodes of vaginal candidosis in the 6 months preceding study entry) were treated with saperconazole according to one of the following treatment schedules: 2 x 100 mg o.d. for 1 day (87 patients), 2 x 100 mg b.i.d. for 1 day (83 patients), or 2 x 100 mg o.d. for 2 days (86 patients). A total of 236 patients were included in the efficacy analysis. Diagnosis of vaginal candidosis was made at the start by a direct microscopic examination of a vaginal smear and was confirmed by culture. The majority of isolated yeasts were Candida albicans (97.6%). All three dose regimens resulted in clinical cure rates of over 75%, and these were maintained for at least 1 month after the end of treatment. There was a difference in mycological cure rates between the three dose schedules (71, 85 and 92%) 1 week after the end of therapy. In view of the clinical and mycological results both 1 week and 1 month after the end of treatment, it can be concluded that a total dose of 400 mg of saperconazole given in a single day is the optimum treatment schedule. All treatment regimens were well tolerated (adverse experiences occurred in 1.6% of the patients) and the results 1 month after termination of therapy suggest a low relapse rate.


Assuntos
Antifúngicos/administração & dosagem , Azóis/administração & dosagem , Candidíase Vulvovaginal/tratamento farmacológico , Doença Aguda , Adolescente , Adulto , Esquema de Medicação , Avaliação de Medicamentos , Feminino , Humanos , Pessoa de Meia-Idade
19.
Eur Respir J ; 3(7): 837-9, 1990 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-2175709

RESUMO

We report a case of aspergilloma in a necrotic small cell lung cancer, where poor pulmonary function and performance status of the patient precluded surgical treatment. High dose Itraconazole, a new oral anti-mycotic drug, was given for 13 months. During this treatment there was a decrease of the fungus ball size and no haemoptysis. Moreover control of the aspergilloma allowed chemotherapeutic treatment of the underlying bronchocarcinoma.


Assuntos
Antifúngicos/administração & dosagem , Aspergilose/tratamento farmacológico , Carcinoma de Células Pequenas/complicações , Cetoconazol/análogos & derivados , Pneumopatias Fúngicas/tratamento farmacológico , Neoplasias Pulmonares/complicações , Antifúngicos/uso terapêutico , Aspergilose/complicações , Aspergillus fumigatus , Humanos , Itraconazol , Cetoconazol/administração & dosagem , Cetoconazol/uso terapêutico , Pneumopatias Fúngicas/complicações , Masculino , Pessoa de Meia-Idade
20.
J Am Acad Dermatol ; 22(5 Pt 1): 751-5, 1990 May.
Artigo em Inglês | MEDLINE | ID: mdl-2189906

RESUMO

Recently the pharmacologic role of leukotrienes (LTs), especially that of LTB4, has been intensively investigated in psoriasis. In vitro, R 68 151 is a potent 5-lipoxygenase inhibitor and consequently reduces LTB4 formation. Therefore the role of an in vitro 5-lipoxygenase inhibitor and its clinical use in psoriasis were evaluated with topical R 68 151 in a double-blind vehicle-controlled study. Eighty-eight patients with localized psoriatic lesions were treated twice daily with R 68 151 2% ointment (n = 44) or vehicle ointment (n = 44) during 4 weeks. Most patients (n = 73) had psoriasis vulgaris (n = 37, R 68 151; n = 36, vehicle). In 27% of the R 68 151-treated patients with psoriasis vulgaris, the lesions disappeared or showed marked improvement, compared with 8% in the vehicle group (X2, p = 0.06). The scores in global evaluation, however, were significantly different between both treatment groups (p less than 0.05, Mann-Whitney U test). The improvement of the mean symptom score with R 68 151 was 46% for scaling and 34% for erythema at the end of the study compared with an improvement of 6% and a deterioration of 3%, respectively, in the control group (p less than 0.05, p less than 0.01; Mann-Whitney U test). The global evaluation in the total group of patients with psoriasis (all different subtypes) was consistent with the response rate in the group of patients with psoriasis vulgaris: 30% in the test group versus 11% in the control group (X2, p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)


Assuntos
Araquidonato Lipoxigenases/antagonistas & inibidores , Imidazóis , Inibidores de Lipoxigenase , Piperazinas , Psoríase/tratamento farmacológico , Administração Cutânea , Adolescente , Adulto , Idoso , Araquidonato 5-Lipoxigenase/administração & dosagem , Araquidonato 5-Lipoxigenase/efeitos adversos , Araquidonato 5-Lipoxigenase/uso terapêutico , Método Duplo-Cego , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Multicêntricos como Assunto , Veículos Farmacêuticos
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