gpo醫學上是什么意思？

GPO是20世紀初期美國的一個藥品集中采購組織。

20世紀初期，美國藥品集中采購組織（Group purchasing organizations,簡稱GPO或者GPOs）出現，通過市場競爭將醫院的需求通過GPO這樣的采購中介進行集中采購。

GPO的出現為醫療機構的成本節約，減少美國醫療費用上漲的壓力起到了一定的作用。

從20世紀50年代末至20世紀90年代初，美國GPO數量不斷增長；采購商品也從初期購買大量的一次性用品（如注射器、導管和藥品）逐漸加入了化妝品、醫療器械、手術耗材、辦公用品、膳食等。服務對象也不斷擴大，覆蓋醫療機構，診所，個人診所，療養院等。

去美國帶藥品有規定嗎

法律分析：美國食品和藥品管理局（FDA）對攜帶藥品入境有嚴格規定，即使某些藥物具有其他國家的醫生處方，在其他國家是合法的，只要其未經FDA批準就不能入境。美海關建議入境者僅攜帶旅途適量必需的藥物。如需攜帶的藥物中含有潛在的成癮性或麻醉劑成分，請務必向海關官員申報攜帶的所有藥物。中國公民入境美國時，請一定避免攜帶含有麻黃堿、士的寧、嗎啡、動物或動物器官等成分的中藥或中成藥。

法律依據：美國《Unapproved Drugs》

Preserving Patient Access to Medically Necessary Drugs

The agency balances its goal to eliminate unapproved prescription drugs from the market with patient access to medically necessary drugs. FDA carefully considers the possible effects on patient access, including whether any action would likely lead to a disruption in the drug supply, before initiating an action against an unapproved drug.

The agency permits some unapproved drugs to be marketed if they are relied on by health care professionals to treat serious medical conditions when there is no FDA-approved drug to treat the condition or there is insufficient supply of FDA-approved drugs.

FDA Approval is Required by Law

Federal law requires all new drugs in the U.S. be shown to be safe and effective for their intended use prior to marketing. However, some drugs are available in the U.S. even though they have never received the required FDA approval. Many health care professionals and patients are unaware that some of the drugs prescribed are not FDA approved.

FDA permits some unapproved prescription drugs to be marketed if:

the drug is subject to an open drug efficacy study implementation (DESI) program proceeding,

health care professionals rely on the drug to treat serious medical conditions when there is no FDA-approved drug to treat the condition,

there is insufficient supply of an FDA-approved drug.

The law allows some unapproved prescription drugs to be lawfully marketed if they meet the criteria of generally recognized as safe and effective (GRASE) or grandfathered. However, the agency is not aware of any human prescription drug that is lawfully marketed as grandfathered.