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注射用巴利昔单抗(SIMULECT,舒莱)-预防肾移植术后急性排斥反应

——舒莱-预防肾移植术后早期急性器官排斥反应

2005-03-25 16:05:46  作者:新特药房  来源:中国新特药网天津分站  浏览次数:142  文字大小:【】【】【

 【药品名称】
商品名:舒莱
通用名:注射用巴利昔单抗
英文名:Basiliximab for Injection
汉语拼音:Zhusheyong Balixidankang

【成分】
舒莱主要成分为巴利昔单抗。

【药物分类】
免疫抑制剂

【性状】
本药除活性成分外,还含有以下赋形剂 :亚磷酸二氢钾、磷酸氢二钠、氧化钠、蔗糖、甘糖醇、甘氨酸等。舒莱不含防腐剂。外观为白色冻干物。

【药理作用】
巴利昔单抗是一种鼠/人嵌合的单克隆抗体(1gG1K)。它能定向拮抗白细胞介素-2(IL-2)的受体α链(CD25抗原),CD25抗原在抗原的激发反应中,表达于T-淋巴细胞表面。激活的T-淋巴细胞对IL-2具极高的亲和力,巴利昔单抗则能特异地与激活的T-淋巴细胞上的CD25抗原结合,从而阻断T-淋巴细胞与IL-2结合,亦即阻断了使T-细胞增殖的信息。在血浆巴利昔单抗浓度超过0.2微克/毫升时,就能完全和稳定地阻断IL-2受体。当血药浓度降至0.2微克/毫升以下时,CD25抗原的表达约在1-2周内回复到治疗前水平。舒莱不会造成细胞因子释放或骨髓抑制。
临床研究 :在多项安慰剂对照研究中,已证实了巴利昔单抗在肾移植中预防器官排斥的作用。二项重要的为期12个月的多中心研究显示,巴利昔单抗、环孢素微乳剂及皮质激素合用组与安慰剂组的对比表明,巴利昔单抗能显著减少急性排斥的发生。对268名接受巴利昔单抗的病人所作的抗个体基因型抗体的测试中,仅1例发生抗个体基因抗体反应。在另一项接受巴利昔单抗的172名病人的临床试验中,仅6例(3.5%)发生HAMA(人体抗鼠抗体)反应。

【药代动力学】
已在肾移植病人中进行了单剂量和多剂量的药代动力学研究,其累积剂量为15-150 mg。
吸收 :在静脉推注巴利昔单抗20 mg后的30分钟内,其血浆峰浓度为7.1±5.1 mg/L,随着单次剂量增加至60 mg的最高量时,其血药峰浓度及曲线下面积均成比例地增加。
分布 :巴利昔单抗的稳态分布容积为8.6±4.1 L。其向人体各部位分布的范围和程度尚未全面研究。体外研究显示,巴利昔单抗仅与淋巴细胞以及巨噬细胞/单核细胞结合。
排泄 :终未半衰期为7.2±3.2天,人体清除率为41±19 mL/小时。
在病人中的特点 :在成人患者中,体重或性别对分布容积或清除率无具临床意义的影响。消除半衰期不受年龄(20-69岁)、性别或种族的影响。尚无巴利昔单抗用于新生儿或不足2岁幼儿的资料。一项对8名2-12岁的儿科肾移植病人的临床研究显示,其中央分布容积为1.7±0.6 L,半衰期为9.4±4.9天,清除率为20±4 mL/小时。清除率和分布容积不受年龄(2-12岁)、体重(9-37公斤)或体表面积(0.44-1.20平方米)的影响。
舒莱在成人肝移植病人中的特点是呈稳态分布,其分布容积为7.5±2.5 L,半衰期为4.1±2.1天,清除率为75±24 mL/小时,药物的消除,主要是药物经引流的腹水和手术后的出血而丢失。可以弥补这种较快清除率的是这些病人的受体饱和浓度阈值较低,为0.1 ug/mL。因此,在所推荐的巴利昔单抗剂量水平内,对IL-2Rα阻断的持续时间与在肾移植成人中所获得的时间相似。

【毒理研究】
对敏感兔模型静脉注射巴利昔单抗,剂量高至4 mg/mL,未见局部刺激性。恒河猴静脉注射巴利昔单抗,剂量高达5 mg/kg,每周2次,共4周,未见毒性。而此最高剂量所产生的血药浓度已经是在肾移植病人中与其他免疫抑制剂联合应用的巴利昔单抗推荐剂量所产生的Cmax的20倍,在猕猴交媾后,即静脉推注巴利昔单抗,最高量达5 mg/kg,每周2次。于此用药后的100天胚胎器官发生期间,未见舒莱对母体、胚胎产生毒性或有致畸性。
在离体实验中,未见可能的致遗传突变性。

【适应症】
巴利昔单抗用于预防首次肾移植术后早期急性器官排斥反应。舒莱通常与环孢素微乳剂及含皮质激素为基础的免疫抑制剂联合使用。

【用法用量】
成人 推荐剂量 :标准总剂量为40 mg,分2次给予,每次20 mg。首次20 mg应于术前2小时内给予,第二次20 mg应于移植术后4天给予。如果发生术后并发症,如移植物失功等,则应停止第二次给药。
体重≥ (greater than or equal to) 40 kg的儿童 ,总量为40 mg,分2次给予,每剂20 mg。体重< 40 kg儿童 :总量为20 mg,分2次给予,每剂10 mg。首次应于术前2小时内给予,第二次用药应于移植术后4天给予。如果发生术后并发症,如移植物失功等,则应停止第二次给药。
经配制后的巴利昔单抗,既可在20-30分钟内作静脉滴注,也可一次性静脉推注。

【不良反应】
巴利昔单抗既不会增加因器官移植病人的基本疾病所导致的不良事件,也不会增加因同时服用免疫抑制剂或其它药物所发生的不良事件。在两项对照试验中,接受推荐用量的巴利昔单抗的363名病人的不良事件发生率与359名接受安慰剂的对照病人相比,两者无差别。两组最常见的不良事件(大于20%)为便秘、尿道感染、疼痛、恶心、外周性水肿、高血压、贫血、头痛以及高血钾。该结果与94名接受巴利昔单抗推荐剂量的非对照性试验的结果相似。在静脉注射巴利昔单抗期间及以后,未见细胞因子释放综合征出现,故不必使用激素预防。

【禁忌症】
对巴利昔单抗以及处方中其它任何成分过敏者均禁用。

【注意事项】
巴利昔单抗仅限于对器官移植术后进行免疫抑制治疗有经验的医师使用。除环孢素微乳剂及皮质激素外,巴利昔单抗与其它免疫抑制剂合用的经验有限。在所推荐的剂量范围内,巴利昔单抗在为数不多的病人中与硫唑嘌呤联合使用过。另外,一项应用巴利昔单抗的病人曾在移植术后的不同时间接受过马替麦考酚酯或抗体治疗,例如OKT3或ATG/ALG,而这些病人并未出现过度免疫抑制的症状。不过,除了环孢素微乳剂及皮质激素外,巴利昔单抗与其它免疫抑制剂合用时,有增加过度免疫抑制的可能。
对驾驶和操作机械能力的影响 舒莱对驾驶和操作机械的能力无影响。

【孕妇及哺乳期妇女用药】
尚未在妊娠或哺乳妇女中进行舒莱的研究。由于巴利昔单抗是一种免疫球蛋白G(IgG1k),它可以透过胎盘以及经乳汁排出,故妊娠妇女不应使用舒莱,除非舒莱对母亲的可能益处远超过对胎儿的潜在危险。妇女在接受第二次巴利昔单抗后的8周内,不应授乳。

【儿童用药】
巴利昔单抗用于儿童的经验有限。推荐剂量见“用法用量”。

【老年患者用药】
巴利昔单抗用于老年人的资料有限,但无证据显示老年人的用量与年轻人不同。

【药物相互作用】
由于巴利昔单抗是一种免疫球蛋白,故不存在代谢后的药物与药物间的相互作用。在应用巴利昔单抗的病人中,其人体抗鼠抗体(HAMA)的反应罕见(3.5%)。但巴利昔单抗不能阻断随后用鼠抗淋巴细胞抗体处理后的反应。

【药物过量】
在多个临床试验中,给予受试人单次剂量高达60 mg,以及在24天内多次累积剂量达150 mg,未见急性不良反应。在对恒河猴以巴利昔单抗5 mg/kg,每周2次的4周观察试验中,其血药浓度可达170 ug/mL,未见明显的不良反应,而所推荐的巴利昔单抗剂量水平用于人体时,其所产生的血药浓度一般低于10 ug/mL。

【用药须知】
每盒巴利昔单抗包装内另配1支5 mL注射用水。向瓶内加入5 mL注射用水,以配制静脉滴注/注射液,轻摇小瓶使粉末溶解。溶液一经配制,应尽快使用,在室温下可保存4小时 ;2-8°C 冰箱可保存24小时。若配制液于24小时内未被应用,则将其丢弃。
所配制的巴利昔单抗溶液是等渗的,可用作一次性静脉推注,也可用生理盐水或5%葡萄糖将它稀释至50 mL或以上,以用作静脉滴注。因无巴利昔单抗与其它静脉注射物质的配伍禁忌资料,故巴利昔单抗不应与其它药物/物质混合使用,且通常应使用单独的输液系统给药。

【贮藏/有效期】
冷藏条件下(2-8°C)运输和贮存。有效期3年。

【批准文号】
进口药品注册证号S20020050

【生产企业】
企业名称:Novartis Pharma Schweiz AG


新型免疫抑制剂舒莱预防肾移植术后急性排斥反应的价值。方法 11例肾移植患者采用2剂用药方案进行诱导治疗,并于同期未使用舒莱的肾移植患者进行对照。结果 本组无一例发生急性排斥反应,而对照组发生2例(18.2%)。舒莱与标准免疫抑制治疗方案联用不增加副作用的发生率。结论 舒莱可以有效地预防肾移植术后急性排斥反应,且患者有较好的耐受性
应用舒莱(诺华制药有限公司Simulect)诱导治疗预防肾移植术后急性排斥反应,取得了较好的效果.

SIMULECT - basiliximab for injection 
Novartis Pharmaceuticals Corporation

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SIMULECT®
(basiliximab)
For Injection
Rx only
Prescribing Information
The following prescribing information is based on official labeling in effect July 2009.
WARNING
Only physicians experienced in immunosuppression therapy and management of organ transplantation patients should prescribe Simulect® (basiliximab). The physician responsible for Simulect administration should have complete information requisite for the follow-up of the patient. Patients receiving the drug should be managed in facilities equipped and staffed with adequate laboratory and supportive medical resources.
DESCRIPTION

Simulect® (basiliximab) is a chimeric (murine/human) monoclonal antibody (IgG1k), produced by recombinant DNA technology, that functions as an immunosuppressive agent, specifically binding to and blocking the interleukin‐2 receptor α-chain (IL‐2Rα, also known as CD25 antigen) on the surface of activated T-lymphocytes. Based on the amino acid sequence, the calculated molecular weight of the protein is 144 kilodaltons. It is a glycoprotein obtained from fermentation of an established mouse myeloma cell line genetically engineered to express plasmids containing the human heavy and light chain constant region genes and mouse heavy and light chain variable region genes encoding the RFT5 antibody that binds selectively to the IL‐2Rα.

The active ingredient, basiliximab, is water soluble. The drug product, Simulect, is a sterile lyophilisate which is available in 6 mL colorless glass vials and is available in 10 mg and 20 mg strengths.

Each 10-mg vial contains 10 mg basiliximab, 3.61 mg monobasic potassium phosphate, 0.50 mg disodium hydrogen phosphate (anhydrous), 0.80 mg sodium chloride, 10 mg sucrose, 40 mg mannitol and 20 mg glycine, to be reconstituted in 2.5 mL of Sterile Water for Injection, USP. No preservatives are added.

Each 20-mg vial contains 20 mg basiliximab, 7.21 mg monobasic potassium phosphate, 0.99 mg disodium hydrogen phosphate (anhydrous), 1.61 mg sodium chloride, 20 mg sucrose, 80 mg mannitol and 40 mg glycine, to be reconstituted in 5 mL of Sterile Water for Injection, USP. No preservatives are added.

CLINICAL PHARMACOLOGY

General

Mechanism of Action: Basiliximab functions as an IL‐2 receptor antagonist by binding with high affinity (Ka = 1 × 1010 M-1) to the alpha chain of the high affinity IL‐2 receptor complex and inhibiting IL‐2 binding. Basiliximab is specifically targeted against IL‐2Rα, which is selectively expressed on the surface of activated T-lymphocytes. This specific high affinity binding of Simulect® (basiliximab) to IL‐2Rα competitively inhibits IL‐2-mediated activation of lymphocytes, a critical pathway in the cellular immune response involved in allograft rejection.

While in the circulation, Simulect impairs the response of the immune system to antigenic challenges. Whether the ability to respond to repeated or ongoing challenges with those antigens returns to normal after Simulect is cleared is unknown (see PRECAUTIONS).

Pharmacokinetics

Adults: Single-dose and multiple-dose pharmacokinetic studies have been conducted in patients undergoing first kidney transplantation. Cumulative doses ranged from 15 mg up to 150 mg. Peak mean ± SD serum concentration following intravenous infusion of 20 mg over 30 minutes is 7.1 ± 5.1 mg/L. There is a dose-proportional increase in Cmax and AUC up to the highest tested single dose of 60 mg. The volume of distribution at steady state is 8.6 ± 4.1 L. The extent and degree of distribution to various body compartments have not been fully studied. The terminal half-life is 7.2 ± 3.2 days. Total body clearance is 41 ± 19 mL/h. No clinically relevant influence of body weight or gender on distribution volume or clearance has been observed in adult patients. Elimination half-life was not influenced by age (20-69 years), gender or race (see DOSAGE AND ADMINISTRATION).

Pediatric: The pharmacokinetics of Simulect have been assessed in 39 pediatric patients undergoing renal transplantation. In infants and children (1-11 years of age, n = 25), the distribution volume and clearance were reduced by about 50% compared to adult renal transplantation patients. The volume of distribution at steady state was 4.8 ± 2.1 L, half-life was 9.5 ± 4.5 days and clearance was 17 ± 6 mL/h. Disposition parameters were not influenced to a clinically relevant extent by age (1-11 years of age), body weight (9-37 kg) or body surface area (0.44-1.20 m2) in this age group. In adolescents (12-16 years of age, n = 14), disposition was similar to that in adult renal transplantation patients. The volume of distribution at steady state was 7.8 ± 5.1 L, half-life was 9.1 ± 3.9 days and clearance was 31 ± 19 mL/h (see DOSAGE AND ADMINISTRATION).

Pharmacodynamics

Complete and consistent binding to IL‐2Rα in adults is maintained as long as serum Simulect levels exceed 0.2 μg/mL. As concentrations fall below this threshold, the IL‐2Rα sites are no longer fully bound and the number of T‐cells expressing unbound IL‐2Rα returns to pretherapy values within 1-2 weeks. The relationship between serum concentration and receptor saturation was assessed in 13 pediatric patients and was similar to that characterized in adult renal transplantation patients. In vitro studies using human tissues indicate that Simulect binds only to lymphocytes.

The duration of clinically relevant IL‐2 receptor blockade after the recommended course of Simulect is not known. When basiliximab was added to a regimen of cyclosporine, USP (MODIFIED) and corticosteroids in adult patients, the duration of IL‐2α saturation was 36 ± 14 days (mean ± SD), similar to that observed in pediatric patients (36 ± 14 days) (see DOSAGE AND ADMINISTRATION). When basiliximab was added to a triple therapy regimen consisting of cyclosporine, USP (MODIFIED), corticosteroids, and azathioprine in adults, the duration was 50 ± 20 days and when added to cyclosporine, USP (MODIFIED), corticosteroids, and mycophenolate mofetil in adults, the duration was 59 ± 17 days (see PRECAUTIONS, Drug Interactions). No significant changes to circulating lymphocyte numbers or cell phenotypes were observed by flow cytometry.

CLINICAL STUDIES

The safety and efficacy of Simulect® (basiliximab) for the prophylaxis of acute organ rejection in adults following cadaveric- or living-donor renal transplantation were assessed in four randomized, double-blind, placebo-controlled clinical studies (1,184 patients). Of these four, two studies (Study 1 [EU/CAN] and Study 2 [US Study]) compared two 20-mg doses of Simulect with placebo, each administered intravenously as an infusion, as part of a standard immunosuppressive regimen comprised of cyclosporine, USP (MODIFIED) and corticosteroids. The other two controlled studies compared two 20-mg doses of Simulect with placebo, each administered intravenously as a bolus injection, as part of a standard triple-immunosuppressive regimen comprised of cyclosporine, USP (MODIFIED), corticosteroids and either azathioprine or mycophenolate mofetil (Study 3 and Study 4, respectively). The first dose of Simulect or placebo was administered within 2 hours prior to transplantation surgery (Day 0) and the second dose administered on Day 4 post-transplantation. The regimen of Simulect was chosen to provide 30-45 days of IL‐2Rα saturation.

729 patients were enrolled in the two studies using a dual maintenance immunosuppressive regimen comprised of cyclosporine, USP (MODIFIED) and corticosteroids, of which 363 patients were treated with Simulect and 358 patients were placebo-treated. Study 1 was conducted at 21 sites in Europe and Canada (EU/CAN Study); Study 2 was conducted at 21 sites in the USA (US Study). Patients 18-75 years of age undergoing first cadaveric- (Study 1 and Study 2) or living-donor (Study 2 only) renal transplantation, with ≥1 HLA mismatch, were enrolled.1,2

The primary efficacy endpoint in both studies was the incidence of death, graft loss or an episode of acute rejection during the first 6 months post-transplantation. Secondary efficacy endpoints included the primary efficacy variable measured during the first 12 months post-transplantation, the incidence of biopsy-confirmed acute rejection during the first 6 and 12 months post-transplantation, and patient survival and graft survival, each measured at 12 months post-transplantation. Table 1 summarizes the results of these studies. Figure 1 displays the Kaplan-Meier estimates of the percentage of patients by treatment group experiencing the primary efficacy endpoint during the first 12 months post-transplantation for Study 2. Patients in both studies receiving Simulect experienced a significantly lower incidence of biopsy-confirmed rejection episodes at both 6 and 12 months post-transplantation. There was no difference in the rate of delayed graft function, patient survival, or graft survival between Simulect-treated patients and placebo-treated patients in either study.

There was no evidence that the clinical benefit of Simulect was limited to specific subpopulations based on age, gender, race, donor type (cadaveric or living donor allograft) or history of diabetes mellitus.

Table 1 Efficacy Parameters (Percentage of Patients)
Dual-therapy Regimen (cyclosporine* and corticosteroids)
Placebo (N = 185) Study 1 Simulect® (N = 190) p-value Placebo (N = 173) Study 2 Simulect® (N = 173) p-value
Primary endpoint
Death, graft loss or acute rejection episode (0-6 months)
57% 42% 0.003 55% 38% 0.002
Secondary endpoints
Death, graft loss or acute rejection episode (0-12 months)
60% 46% 0.007 58% 41% 0.001
Biopsy-confirmed rejection episode (0-6 months)
44% 30% 0.007 46% 33% 0.015
Biopsy-confirmed rejection episode (0-12 months)
46% 32% 0.005 49% 35% 0.009
Patient survival (12 months)
97% 95%  0.29 96% 97%  0.56
Patients with functioning graft (12 months)
87% 88%  0.70 93% 95%  0.50

Two double-blind, randomized, placebo-controlled studies (Study 3 and Study 4) assessed the safety and efficacy of Simulect for the prophylaxis of acute renal transplant rejection in adults when used in combination with a triple immunosuppressive regimen. In Study 3, 340 patients were concomitantly treated with cyclosporine, USP (MODIFIED), corticosteroids and azathioprine (AZA), of which 168 patients were treated with Simulect and 172 patients were treated with placebo. In Study 4, 123 patients were concomitantly treated with cyclosporine, USP (MODIFIED), corticosteroids and mycophenolate mofetil (MMF), of which 59 patients were treated with Simulect and 64 patients were treated with placebo. Patients 18-70 years of age undergoing first or second cadaveric or living donor (related or unrelated) renal transplantation were enrolled in both studies.

The results of Study 3 are shown in Table 2. These results are consistent with the findings from Study 1 and Study 2.

Table 2 Efficacy Parameters (Percentage of Patients)
Study 3: Triple-therapy Regimen (cyclosporine*, corticosteroids, and azathioprine)
Placebo (N = 172) Simulect® (N = 168) p-value
*USP (MODIFIED)
Primary endpoint
Acute rejection episode (0-6 months) 35% 21% 0.005
Secondary endpoints
Death, graft loss or acute rejection episode (0-6 months) 40% 26% 0.008
Biopsy-confirmed rejection episode (0-6 months) 29% 18% 0.023
Patient survival (12 months) 97% 98% 1.000
Patients with functioning graft (12 months) 88% 90% 0.599

In Study 4, the percentage of patients experiencing biopsy-proven acute rejection by 6 months was 15% (9 of 59 patients) in the Simulect group and 27% (17 of 64 patients) in the placebo group. Although numerically lower, the difference in acute rejection was not significant.

In a multicenter, randomized, double-blind, placebo-controlled trial of Simulect for the prevention of allograft rejection in liver transplant recipients (n = 381) receiving concomitant cyclosporine, USP (MODIFIED) and steroids, the incidence of the combined endpoint of death, graft loss, or first biopsy-confirmed rejection episode at either 6 or 12 months was similar between patients randomized to receive Simulect and those randomized to receive placebo.

The efficacy of Simulect for the prophylaxis of acute rejection in recipients of a second renal allograft has not been demonstrated.

Long Term Follow-up

Five-year patient survival and graft survival data were provided by 71% and 58% of the original subjects of Study 1 and Study 2, respectively. Subjects in both studies continued to receive a dual-therapy regimen with cyclosporine, USP (MODIFIED) and corticosteroid. No difference was observed between groups in the 5-year graft survival in either Study 1 (91% Simulect group, 92% placebo group) or Study 2 (85% Simulect group, 86% placebo group). In Study 1, patient survival was lower in the Simulect-treated patients compared to the placebo-treated patients (142/163 [87%] vs. 156/164 [95%], respectively). The cause of this difference in survival is unknown. The data do not indicate an increase in malignancy- or infection-related mortality. In Study 2, patient survival in the placebo group (90%) was the same compared to Simulect group (90%).

INDICATIONS AND USAGE

Simulect® (basiliximab) is indicated for the prophylaxis of acute organ rejection in patients receiving renal transplantation when used as part of an immunosuppressive regimen that includes cyclosporine, USP (MODIFIED) and corticosteroids.

The efficacy of Simulect for the prophylaxis of acute rejection in recipients of other solid organ allografts has not been demonstrated.

CONTRAINDICATIONS

Simulect® (basiliximab) is contraindicated in patients with known hypersensitivity to basiliximab or any other component of the formulation. See composition of Simulect under DESCRIPTION.

WARNINGS. See Boxed WARNING.

General

Simulect® (basiliximab) should be administered under qualified medical supervision. Patients should be informed of the potential benefits of therapy and the risks associated with administration of immunosuppressive therapy.

While neither the incidence of lymphoproliferative disorders nor opportunistic infections was higher in Simulect-treated patients than in placebo-treated patients, patients on immunosuppressive therapy are at increased risk for developing these complications and should be monitored accordingly.

Hypersensitivity

Severe acute (onset within 24 hours) hypersensitivity reactions including anaphylaxis have been observed both on initial exposure to Simulect and/or following re-exposure after several months. These reactions may include hypotension, tachycardia, cardiac failure, dyspnea, wheezing, bronchospasm, pulmonary edema, respiratory failure, urticaria, rash, pruritus, and/or sneezing. Extreme caution should be exercised in all patients previously given Simulect when being administered a subsequent course of Simulect. A subgroup of patients may be particularly at risk of developing severe hypersensitivity reactions on re-administration. These are patients in whom concomitant immunosuppression was discontinued prematurely (e.g., due to abandoned transplantation or early loss of the graft) following the initial administration of Simulect. If a severe hypersensitivity reaction occurs, therapy with Simulect should be permanently discontinued. Medications for the treatment of severe hypersensitivity reactions including anaphylaxis should be available for immediate use.

PRECAUTIONS

General

It is not known whether Simulect® (basiliximab) use will have a long-term effect on the ability of the immune system to respond to antigens first encountered during Simulect-induced immunosuppression.

Immunogenicity

Of renal transplantation patients treated with Simulect and tested for anti-idiotype antibodies, 4/339 developed an anti-idiotype antibody response, with no deleterious clinical effect upon the patient. In none of these cases was there evidence that the presence of anti-idiotype antibody accelerated Simulect clearance or decreased the period of receptor saturation. In Study 2, the incidence of human anti-murine antibody (HAMA) in renal transplantation patients treated with Simulect was 2/138 in patients not exposed to muromonab-CD3 and 4/34 in patients who subsequently received muromonab-CD3. The available clinical data on the use of muromonab-CD3 in patients previously treated with Simulect suggest that subsequent use of muromonab-CD3 or other murine anti-lymphocytic antibody preparations is not precluded.

These data reflect the percentage of patients whose test results were considered positive for antibodies to Simulect in an ELISA assay, and are highly dependent on the sensitivity and specificity of the assay. Additionally the observed incidence of antibody positivity in an assay may be influenced by several factors including sample handling, concomitant medications, and underlying disease. For these reasons, comparison of the incidence of antibodies to Simulect with the incidence of antibodies to other products may be misleading.

Drug Interactions

No dose adjustment is necessary when Simulect is added to triple-immunosuppression regimens including cyclosporine, corticosteroids, and either azathioprine or mycophenolate mofetil. Three clinical trials have investigated Simulect use in combination with triple-therapy regimens. Pharmacokinetics were assessed in two of these trials. Total body clearance of Simulect was reduced by an average 22% and 51% when azathioprine and mycophenolate mofetil, respectively, were added to a regimen consisting of cyclosporine, USP (MODIFIED) and corticosteroids. Nonetheless, the range of individual Simulect clearance values in the presence of azathioprine (12-57 mL/h) or mycophenolate mofetil (7-54 mL/h) did not extend outside the range observed with dual therapy (10-78 mL/h). The following medications have been administered in clinical trials with Simulect with no increase in adverse reactions: ATG/ALG, azathioprine, corticosteroids, cyclosporine, mycophenolate mofetil, and muromonab-CD3.

Carcinogenesis/Mutagenesis/Impairment of Fertility

No mutagenic potential of Simulect was observed in the in vitro assays with Salmonella (Ames) and V79 Chinese hamster cells. No long-term or fertility studies in laboratory animals have been performed to evaluate the potential of Simulect to produce carcinogenicity or fertility impairment, respectively.

Pregnancy Category B

There are no adequate and well-controlled studies in pregnant women. No maternal toxicity, embryotoxicity, or teratogenicity was observed in cynomolgus monkeys 100 days post coitum following dosing with basiliximab during the organogenesis period; blood levels in pregnant monkeys were 13-fold higher than those seen in human patients. Immunotoxicology studies have not been performed in the offspring. Because IgG molecules are known to cross the placental barrier, because the IL‐2 receptor may play an important role in development of the immune system, and because animal reproduction studies are not always predictive of human response, Simulect should only be used in pregnant women when the potential benefit justifies the potential risk to the fetus. Women of childbearing potential should use effective contraception before beginning Simulect therapy, during therapy, and for 4 months after completion of Simulect therapy.

Nursing Mothers

It is not known whether Simulect is excreted in human milk. Because many drugs including human antibodies are excreted in human milk, and because of the potential for adverse reactions, a decision should be made to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

Pediatric Use

No randomized, placebo-controlled studies have been completed in pediatric patients. In a safety and pharmacokinetic study, 41 pediatric patients (1-11 years of age [n = 27], 12-16 years of age [n = 14], median age 8.1 years) were treated with Simulect via intravenous bolus injection in addition to standard immunosuppressive agents including cyclosporine, USP (MODIFIED), corticosteroids, azathioprine, and mycophenolate mofetil. The acute rejection rate at 6 months was comparable to that in adults in the triple-therapy trials. The most frequently reported adverse events were hypertension, hypertrichosis, and rhinitis (49% each), urinary tract infections (46%), and fever (39%). Overall, the adverse event profile was consistent with general clinical experience in the pediatric renal transplantation population and with the profile in the controlled adult renal transplantation studies. The available pharmacokinetic data in children and adolescents are described in CLINICAL PHARMACOLOGY and DOSAGE AND ADMINISTRATION.

It is not known whether the immune response to vaccines, infection, and other antigenic stimuli administered or encountered during Simulect therapy is impaired or whether such response will remain impaired after Simulect therapy.

Geriatric Use

Controlled clinical studies of Simulect have included a small number of patients 65 years and older (Simulect 28; placebo 32). From the available data comparing Simulect and placebo-treated patients, the adverse event profile in patients ≥65 years of age is not different from patients <65 years of age and no age-related dosing adjustment is required. Caution must be used in giving immunosuppressive drugs to elderly patients.

ADVERSE REACTIONS

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The adverse reaction information from clinical trials does, however, provide a basis for identifying the adverse events that appear to be related to drug use and for approximating rates.

The incidence of adverse events for Simulect® (basiliximab) was determined in four randomized, double-blind, placebo-controlled clinical trials for the prevention of renal allograft rejection. Two of the studies (Study 1 and Study 2), used a dual maintenance immunosuppressive regimen comprised of cyclosporine, USP (MODIFIED) and corticosteroids, whereas the other two studies (Study 3 and Study 4) used a triple-immunosuppressive regimen comprised of cyclosporine, USP (MODIFIED), corticosteroids, and either azathioprine or mycophenolate mofetil.

Simulect did not appear to add to the background of adverse events seen in organ transplantation patients as a consequence of their underlying disease and the concurrent administration of immunosuppressants and other medications. Adverse events were reported by 96% of the patients in the placebo-treated group and 96% of the patients in the Simulect-treated group. In the four placebo-controlled studies, the pattern of adverse events in 590 patients treated with the recommended dose of Simulect was similar to that in 594 patients treated with placebo. Simulect did not increase the incidence of serious adverse events observed compared with placebo.

The most frequently reported adverse events were gastrointestinal disorders, reported in 69% of Simulect-treated patients and 67% of placebo-treated patients.

The incidence and types of adverse events were similar in Simulect-treated and placebo-treated patients. The following adverse events occurred in ≥10% of Simulect-treated patients:

Gastrointestinal System: constipation, nausea, abdominal pain, vomiting, diarrhea, dyspepsia;

Body as a Whole-General: pain, peripheral edema, fever, viral infection;

Metabolic and Nutritional: hyperkalemia, hypokalemia, hyperglycemia, hypercholesterolemia, hypophosphatemia, hyperuricemia;

Urinary System: urinary tract infection;

Respiratory System: dyspnea, upper respiratory tract infection;

Skin and Appendages: surgical wound complications, acne;

Cardiovascular Disorders-General: hypertension;

Central and Peripheral Nervous System: headache, tremor;

Psychiatric: insomnia;

Red Blood Cell: anemia.

The following adverse events, not mentioned above, were reported with an incidence of ≥ 3% and <10% in pooled analysis of patients treated with Simulect in the four controlled clinical trials, or in an analysis of the two dual-therapy trials:

Body as a Whole-General: accidental trauma, asthenia, chest pain, increased drug level, infection, face edema, fatigue, dependent edema, generalized edema, leg edema, malaise, rigors, sepsis;

Cardiovascular: abnormal heart sounds, aggravated hypertension, angina pectoris, cardiac failure, chest pain, hypotension;

Endocrine: increased glucocorticoids;

Gastrointestinal: enlarged abdomen, esophagitis, flatulence, gastrointestinal disorder, gastroenteritis, GI hemorrhage, gum hyperplasia, melena, moniliasis, ulcerative stomatitis;

Heart Rate and Rhythm: arrhythmia, atrial fibrillation, tachycardia;

Metabolic and Nutritional: acidosis, dehydration, diabetes mellitus, fluid overload, hypercalcemia, hyperlipemia, hyper-triglyceridemia, hypocalcemia, hypoglycemia, hypomagnesemia, hypoproteinemia, weight increase;

Musculoskeletal: arthralgia, arthropathy, back pain, bone fracture, cramps, hernia, myalgia, leg pain;

Nervous System: dizziness, neuropathy, paraesthesia, hypoesthesia;

Platelet and Bleeding: hematoma, hemorrhage, purpura, thrombocytopenia, thrombosis;

Psychiatric: agitation, anxiety, depression;

Red Blood Cell: polycythemia;

Reproductive Disorders, Male: genital edema, impotence;

Respiratory: bronchitis, bronchospasm, abnormal chest sounds, coughing, pharyngitis, pneumonia, pulmonary disorder, pulmonary edema, rhinitis, sinusitis;

Skin and Appendages: cyst, herpes simplex, herpes zoster, hypertrichosis, pruritus, rash, skin disorder, skin ulceration;

Urinary: albuminuria, bladder disorder, dysuria, frequent micturition, hematuria, increased non-protein nitrogen, oliguria, abnormal renal function, renal tubular necrosis, surgery, ureteral disorder, urinary retention;

Vascular Disorders: vascular disorder;

Vision Disorders: cataract, conjunctivitis, abnormal vision;

White Blood Cell: leucopenia. Among these events, leucopenia and hypertriglyceridemia occurred more frequently in the two triple-therapy studies using azathioprine and mycophenolate mofetil than in the dual-therapy studies.

Malignancies

The incidence of malignancies in the controlled clinical trials of renal transplant was not significantly different between groups at 1 year (9/590 Simulect-treated patients vs. 12/594 placebo-treated patients) or among patients with 5-year follow-up from Studies 1 and 2 (21/295 Simulect-treated patients vs. 21/291 placebo-treated patients). The incidence of lymphoproliferative disease was not significantly different between groups, and less than 1% in the Simulect-treated patients.

Infections

The overall incidence of cytomegalovirus infection was similar in Simulect- and placebo-treated patients (15% vs. 17%) receiving a dual- or triple-immunosuppression regimen. However, in patients receiving a triple-immunosuppression regimen, the incidence of serious cytomegalovirus infection was higher in Simulect-treated patients compared to placebo-treated patients (11% vs. 5%). The rates of infections, serious infections, and infectious organisms were similar in the Simulect- and placebo-treatment groups among dual- and triple-therapy treated patients.

Post Marketing Experience

Severe acute hypersensitivity reactions including anaphylaxis characterized by hypotension, tachycardia, cardiac failure, dyspnea, wheezing, bronchospasm, pulmonary edema, respiratory failure, urticaria, rash, pruritus, and/or sneezing, as well as capillary leak syndrome and cytokine release syndrome, have been reported during post-marketing experience with Simulect.

OVERDOSAGE

A maximum tolerated dose of Simulect® (basiliximab) has not been determined in patients. During the course of clinical studies, Simulect has been administered to adult renal transplantation patients in single doses of up to 60 mg, or in divided doses over 3-5 days of up to 120 mg, without any associated serious adverse events. There has been one spontaneous report of a pediatric renal transplantation patient who received a single 20-mg dose (2.3 mg/kg) without adverse events.

DOSAGE AND ADMINISTRATION

Simulect® (basiliximab) is used as part of an immunosuppressive regimen that includes cyclosporine, USP (MODIFIED) and corticosteroids. Simulect is for central or peripheral intravenous administration only. Reconstituted Simulect should be given either as a bolus injection or diluted to a volume of 25 mL (10-mg vial) or 50 mL (20-mg vial) with normal saline or dextrose 5% and administered as an intravenous infusion over 20 to 30 minutes. Bolus administration may be associated with nausea, vomiting and local reactions, including pain.

Simulect should only be administered once it has been determined that the patient will receive the graft and concomitant immunosuppression. Patients previously administered Simulect should only be re-exposed to a subsequent course of therapy with extreme caution due to the potential risk of hypersensitivity (see WARNINGS).

Parenteral drug products should be inspected visually for particulate matter and discoloration before administration. After reconstitution, Simulect should be a clear-to-opalescent, colorless solution. If particulate matter is present or the solution is colored, do not use.

Care must be taken to assure sterility of the prepared solution because the drug product does not contain any antimicrobial preservatives or bacteriostatic agents.

It is recommended that after reconstitution, the solution should be used immediately. If not used immediately, it can be stored at 2°C to 8°C for 24 hours or at room temperature for 4 hours. Discard the reconstituted solution if not used within 24 hours.

No incompatibility between Simulect and polyvinyl chloride bags or infusion sets has been observed. No data are available on the compatibility of Simulect with other intravenous substances. Other drug substances should not be added or infused simultaneously through the same intravenous line.

Adults

In adult patients, the recommended regimen is two doses of 20 mg each. The first 20-mg dose should be given within 2 hours prior to transplantation surgery. The recommended second 20-mg dose should be given 4 days after transplantation. The second dose should be withheld if complications such as severe hypersensitivity reactions to Simulect or graft loss occur.

Pediatric

In pediatric patients weighing less than 35 kg, the recommended regimen is two doses of 10 mg each. In pediatric patients weighing 35 kg or more, the recommended regimen is two doses of 20 mg each. The first dose should be given within 2 hours prior to transplantation surgery. The recommended second dose should be given 4 days after transplantation. The second dose should be withheld if complications such as severe hypersensitivity reactions to Simulect or graft loss occur.

Reconstitution of 10 mg Simulect® Vial

To prepare the reconstituted solution, add 2.5 mL of Sterile Water for Injection, USP, using aseptic technique, to the vial containing the Simulect powder. Shake the vial gently to dissolve the powder.

The reconstituted solution is isotonic and may be given either as a bolus injection or diluted to a volume of 25 mL with normal saline or dextrose 5% for infusion. When mixing the solution, gently invert the bag in order to avoid foaming; DO NOT SHAKE.

Reconstitution of 20 mg Simulect® Vial

To prepare the reconstituted solution, add 5 mL of Sterile Water for Injection, USP, using aseptic technique, to the vial containing the Simulect powder. Shake the vial gently to dissolve the powder.

The reconstituted solution is isotonic and may be given either as a bolus injection or diluted to a volume of 50 mL with normal saline or dextrose 5% for infusion. When mixing the solution, gently invert the bag in order to avoid foaming; DO NOT SHAKE.

HOW SUPPLIED

Simulect® (basiliximab) is supplied in a single use glass vial.

Each carton contains one of the following:
1 Simulect 10 mg vial NDC 0078-0393-61
1 Simulect 20 mg vial NDC 0078-0331-84

Store lyophilized Simulect under refrigerated conditions (2°C to 8°C; 36°F to 46°F).

Do not use beyond the expiration date stamped on the vial.

REFERENCES

  1. Kahan, B.D., Rajagopalan P.R. and Hall M., Transplantation, 67, 276-284 (1999).

  2. Nashan, B., Moore R., Amlot P., Schmidt A.-G., Abeywickrama K. and Soulillou J.-P., Lancet 350, 1193-1198 (1997).

US License No. 1244

 T2005-28

REV: SEPTEMBER 2005 2027722

Novartis Pharmaceuticals Corporation

East Hanover, New Jersey 07936

©Novartis

PRODUCT PHOTO

NOTE: These photos can be used only for identification by shape, color, and imprint. They do not depict actual or relative size.

The product samples shown here have been supplied by the manufacturer and reproduced in full color by PDR as a quick-reference identification aid. While every effort has been made to assure accurate reproduction, please remember that any visual identification should be considered preliminary. In cases of poisoning or suspected over dosage, the drug's identity should be verified by chemical analysis.

责任编辑:


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