24Drs好健康報:骨鬆用藥每月口服一次 兩年臨床結果證實有效


好健康熱頭條 ─ 骨鬆用藥每月口服一次 兩年臨床結果證實有效 Once-a-Month Osteoporosis Drug Approved
好健康小單字─ 停經後骨質疏鬆症(postmenopausal osteoporosis) 
  好健康熱頭條 ─ 骨鬆用藥每月口服一次 兩年臨床結果證實有效
 
 
一種新的骨質疏鬆治療藥物,每個月服用一次,可避免骨質流失。


根據2005年11月風濕科醫學年會發表之臨床試驗結果,相較於每天口服雙磷酸鹽類骨鬆藥ibandronate(2.5毫克),停經後骨質疏鬆症婦女服用一個月一顆之ibandronate(150毫克)劑型,能有效治療停經後骨質疏鬆症,增加骨質密度。


羅氏藥廠製藥部總裁William Burns評論指出,調查發現,病患使用一週一次的口服療法中,高達6成的患者在一年內停藥;相較於過去一年需要服用365顆、或52顆的用藥方式,未來患者一年只要服用12顆ibandronate 150毫克,大幅提升了骨鬆患者服藥的方便性。


美國魁靈頓大學醫學院骨質疏鬆症研究中心主任,同時也是此臨床試驗計畫主持人Robert Recker表示,由於骨鬆的治療需要患者長時間服用配合才能達到效果,服用頻率越低的用藥對病人越不會造成困擾,尤其對於骨鬆患者來說更是如此。


「行動力 - MOBILE」臨床試驗受試對象為1,609位、停經後骨質疏鬆症的婦女,平均的腰部脊椎骨密度為T score <-2.5;在長達兩年的雙盲試驗中,受試者被隨機分配使用每月一次150毫克的劑型,或每日一次2.5毫克的劑型。


結果顯示:
•150毫克的受試組,其脊椎骨密度提升達6.6%;優於每天服用的劑型的受試者增加5.0%。
•所有受試組別的髖部(大腿骨上端,接著骨盆處)骨密度皆有增加,但以一個月一次的150毫克劑型的受試組增幅最多,達4.2%,每日劑型組增加2.5%。
•兩組在試驗過程中,均持續抑制骨質流失速度。
•大多數的受試者對於口服的用藥方式皆有正向反應,尤其在150毫克劑型組,超過8成的患者全身的骨質密度皆有增加。


此外,這項臨床試驗也證實了病患對服用ibandronate有良好的耐受性:
•每月一次的劑型組與每日劑型組所產生的不良反應發生率相當。
•不良反應的發生率與預期相當,試驗過程中,受試者因不良反應而退出試驗的比例也相當低。


過去常見治療骨質疏鬆症的雙磷酸鹽類藥物有兩種劑型,每週一次以及每天一次;美國食品藥物管理局(FDA)已於2005年3月核准每月一次的ibandronate150毫克劑型,同年9月也經歐盟核可上市。


Ibandronate為目前治療骨鬆最普遍的雙磷酸鹽類藥物之一,已有超過11,000位患者參與ibandronate臨床試驗;現正持續進行的臨床試驗,包括評估每月一顆口服劑型、以及兩個月/每季一次注射劑型,對於停經後骨質疏鬆症婦女的有效性。


Ibandronate與其他雙磷酸鹽類的藥物相同,可能會造成胃食道不舒服,包括吞嚥困難、食道炎、食道或胃潰瘍。


相關文獻參考網址:
http://www.gsk.com/ControllerServlet?appId=4&pageId=402&newsid=355


http://www.gsk.com/ControllerServlet?appId=4&pageId=402&newsid=580
  
  
  
  Once-a-Month Osteoporosis Drug Approved
 
 
A new osteoporosisosteoporosis drug allows people to protect their bones by taking just one pill a month.


Today the FDA approved a once-a-month version of the osteoporosis drug Boniva. The approval makes the drug the first once-a-month medicine designed to treat postmenopausal osteoporosis or any other chronic disease.


Boniva is part of a class of osteoporosis drugs known as bisphosphonates, which help build and maintain bone density (a measure of bone strength) in people with osteoporosis. Other drugs in this class include Actonel and Fosamax, but these must be taken daily or weekly.


Once-monthly Boniva is expected to become available in U.S. pharmacies in April. Boniva is also available as a daily osteoporosis drug.


12 Pills a Year
Nearly 50 million Americans over 50 are affected by or at risk for osteoporosis, mostly postmenopausal women.


Currently, other bisphosphonates are prescribed as daily or once-a-week pills. Researchers say the new treatment option may allow some people with osteoporosis to cut back on the number of pills they take to 12 tablets per year.


The once-monthly pill should be taken with plain water in the morning, and users should remain upright and avoid other foods or drinks for at least 60 minutes. This is to prevent the pill from getting stuck in the esophagus and causing damage and trouble swallowing.


Works as Well as Daily
The FDA approved the once-a-month version of Boniva based on clinical trials involving 1,602 postmenopausal women with osteoporosis. The studies showed that the once-monthly osteoporosis drug was at least as good as the daily dose in increasing bone density of the spine and lower back after one year of treatment.


Boniva is not recommended for people who are unable to stand or sit upright for at least 60 minutes, people with high calcium levels, or people with sensitivities to bisphosphonates. The most common side effects of bisphosphonates include stomach disorders and ulcers.


Boniva is made by Roche and GlaxoSmithKline. GlaxoSmithKline is also a WebMD sponsor.


SOURCES: News release, Roche and GlaxoSmithKline.
WebMD Medical News
  
  
  
  好健康小單字─ 停經後骨質疏鬆症(postmenopausal osteoporosis)
 
 
停經後骨質疏鬆症屬於原發性骨質疏鬆症,又稱為第一型骨質疏鬆症,常見於停經後的婦女;女性在停經後,因為雌激素分泌減少,使得副甲狀腺功能降低、尿液鈣排出呈現增高現象,可能發生脊椎、脕部、髖部骨折。
  
  
  
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