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默沙东失眠药Belsomra终于获FDA批准——如何突围成新的挑战

2014-08-15 佚名 生物谷

默沙东(Merck & Co)失眠药物Belsomra(suvorexant)终于获得了FDA的批准。此前,FDA于2013年曾因安全性问题拒绝批准该药的新药申请(NDA),但为低剂量Belsomra打开了大门。然而,即便现在获得FDA批准,但目前失眠市场已被大量仿制药充斥,如何突围是摆在默沙东面前的新挑战。 默沙东8月13日宣布,FDA批准Belsomra(suvorexant)用

默沙东(Merck & Co)失眠药物Belsomra(suvorexant)终于获得了FDA的批准。此前,FDA于2013年曾因安全性问题拒绝批准该药的新药申请(NDA),但为低剂量Belsomra打开了大门。然而,即便现在获得FDA批准,但目前失眠市场已被大量仿制药充斥,如何突围是摆在默沙东面前的新挑战。

默沙东8月13日宣布,FDA批准Belsomra(suvorexant)用于失眠(insomnia)成人患者。Belsomra是FDA批准的首个新一类失眠药物,该药是一种高度选择性食欲素受体拮抗剂。食欲素(orexin)是存在于大脑特定部位的一种神经递质,可帮助一个人保持清醒,Belsomra通过阻断食欲素来促进睡眠。在临床试验中,从客观的多导睡眠仪监测和主观的患者估计的睡眠潜伏期2方面评估,Belsomra对睡眠潜伏期和睡眠持续期的疗效均明显优于安慰剂。Belsomra的推荐剂量为10mg,每晚服药不可超过一次,睡前30分钟服药。每天一次的总剂量不宜超过20mg。

在III期项目中,Belsomra带来了一些令人印象深刻的疗效数据,可帮助患者快速入睡并整夜保持睡眠,达到了研究的15个主要终点(总共16个)。然而,令人担忧的安全性问题无法使FDA信服:默沙东的最佳数据来自给患者服用30mg和40mg剂量,而FDA认为所使用的剂量与第二天嗜睡的风险相关,而这可能会导致致命的汽车事故,因此FDA于2013年7月拒绝批准Belsomra的新药申请(NDA),但为低剂量suvorexant的获批打开了大门。SI集团分析师Mark Schoenebaum在一份研究报告中,将FDA对Belsomra的意见喻为“山重水复疑无路,柳暗花明又一村”。

现在,FDA做出了妥协,批准Belsomra低剂量给药(5mg至20mg),同时建议医生从最小剂量开始用药,以适应患者的需求。严重失眠患者接受20mg剂量时,应告诫禁止第二天开车,同时FDA称,即便是接受最低剂量的患者,也应该特别注意这种危险。

尽管通过了FDA的批准,但现在摆在默沙东面前的问题是,目前失眠市场已被各类仿制药充斥,包括最畅销药物Ambien(唑吡坦,赛诺菲研制)的仿制药,在这种情况下,低剂量Belsomra若想脱颖而出,可能会遇到不小的麻烦。而且,Belsomra的获批,仅基于安慰剂对照研究,而非与其他失眠药物的头对头研究,因此,如何说服美国6000万失眠患者尝试新的药物,对默沙东而言可谓是一场艰苦的战斗。

因此,分析人士预测,Belsomra的年销售峰值仅为5亿美元左右,远低于2012年许多分析师预测的10亿美元。

FDA已建议Belsomra由美国缉毒局(DEA)进行归类,作为一种调度(schedule)产品。今年年初,DEA根据管控物质法案(Controlled Substance Act)拟议Schedule IV药物分类。目前,DEA尚未对Belsomra的调度做出最终决定,在此之前,Belsomra不能上市销售。默沙东预计,Belsomra将于2014年底或2015年初在美国上市。

英文原文:FDA Approves BELSOMRA® (suvorexant) for the Treatment of Insomnia

BELSOMRA expected to be available in late 2014 or early 2015

WHITEHOUSE STATION, N.J.--(BUSINESS WIRE)--Merck (NYSE:MRK), known as MSD outside the United States and Canada, announced today that the U.S. Food and Drug Administration (FDA) has approved BELSOMRA® (suvorexant) for adults with insomnia who have difficulty falling asleep and/or staying asleep. BELSOMRA (pronounced bell-SOM-rah) is a highly selective antagonist for orexin receptors. Orexin is a neurotransmitter found in a specific part of the brain that can help keep a person awake. The mechanism by which BELSOMRA exerts its therapeutic effect is presumed to be through antagonism of orexin receptors. In the clinical trials to support efficacy, BELSOMRA was superior to placebo for sleep latency and sleep maintenance as assessed both objectively by polysomnography and subjectively by patient-estimated sleep latency. The recommended dose of BELSOMRA is 10 mg, taken no more than once per night and within 30 minutes of going to bed, with at least 7 hours remaining before the planned time of awakening. The total dose should not exceed 20 mg once daily.

“Today’s approval of BELSOMRA allows for the introduction of a new treatment option for patients suffering from insomnia,” said Dr. David Michelson, vice president, Neurosciences, Merck Research Laboratories. “BELSOMRA is the result of more than a decade of Merck research in neuroscience and provides tangible evidence of our long-standing commitment to innovation."

The FDA has recommended BELSOMRA be classified by the U.S. Drug Enforcement Administration (DEA) as a scheduled product. Earlier this year, the DEA proposed a Schedule IV drug classification under the Controlled Substances Act. The DEA has not yet issued a final decision on the scheduling for BELSOMRA and therefore product cannot become available before that decision.

Indication for BELSOMRA

BELSOMRA (suvorexant) is indicated for the treatment of insomnia characterized by difficulties with sleep onset and/or sleep maintenance.

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    2015-03-15 bugit
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    2014-08-17 yese
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    2014-08-17 FukaiBao

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-Genoa制药8月6日宣布,FDA已授予GP-101(吡非尼酮气雾剂,aerosol pirfenidone)治疗特发性肺纤维化(IPF)的孤儿药地位。口服吡非尼酮(品牌名Esbriet)已被证明能够减缓IPF病情的恶化。然而不幸的是,需要非常大的口服剂量才能够实现有效的肺部药物浓度。尽管已确立了吡非尼酮的上限安全阈值(801mg TID,即:801毫克,每天3次),但通过口服给药所能递送的

FDA批准非侵入型大便DNA肠癌筛查试剂盒Cologuard

Exact科学公司8月12日宣布,FDA已批准非侵入型、大便DNA结直肠癌筛查试剂盒Cologuard。而在同一天,Exact公司也收到美国医疗保险和医疗补助服务中心(CMS)提议的医疗保险覆盖备忘录,提议将Cologuard进行全国医疗覆盖。 Cologuard是FDA批准的首个非侵入性结直肠癌筛查试剂盒,通过分析粪便DNA和血液生物标志物来筛查结直肠癌,该试剂盒已被证明能够在平均风

吉利德重磅药物Zydelig治疗复发性CLL III期研究疗效获突破

吉利德(Gilead)7月23日宣布,抗癌药Zydelig(idelalisib)获FDA批准,用于3种B细胞血癌的治疗,分别为:(1)批准Zydelig联合罗氏(Roche)抗癌药美罗华(Rituxan,通用名:rituximab,利妥昔单抗),用于适合Rituxan单药疗法的复发性慢性淋巴细胞白血病(CLL)患者的治疗;(2)批准Zydelig作为单药疗法,用于既往接受过至少2种系统治疗方

FDA批准武田万珂(Velcade)用于多发性骨髓瘤(MM)复治

武田(Takeda)及旗下千禧制药(Millennium)8月9日宣布,FDA已批准Velcade(万珂,通用名:硼替佐米,bortezomib)用于曾对万珂治疗有响应且完成最后一次万珂治疗后至少6个月后病情复发的多发性骨髓瘤(multiple myeloma,MM)成人患者的复治(retreatment,即再治疗)。Velcade的产品标签更新包括给药指南以及Velcade作为单药或Velc

美药物管理局被促请 应尽快批准对抗埃博拉基因治疗新药TKM-Ebola

据台湾“联合新闻网”7月31日报道,国际健诊界由“变革”网站 (chgnag.org)领衔,7月30日向美国联邦食品药物管理局 (FDA)请愿,要求FDA尽快批准一种新药TKM-Ebola,这种药物被认为对于治疗埃博拉有特效。   据称,该药由加拿大药厂Tekmira研发,对杀死灵长类动物身上的埃博拉病毒相当有效,2014年初开始第一阶段人类临床试用,但2014年7月,FDA宣布禁止

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