大麻疯狂?

伦敦—大麻精神健康有害吗?这一问题引起了多年的争论,其热度可谓如火如荼。总结起来是这样的:在科学界,一个一般的共识是,大部分大麻使用者不会产生严重的精神健康问题。不过,一些个体更容易因为使用大麻而出现副作用。

长久以来,人们一直认为大麻是伤害相对较小的毒品,对大麻的担心有些小题大做。一些医生报告说,过量使用大麻会导致精神病症状,包括幻觉、妄想和思维错乱。但大麻使用和精神病联系的第一个重要指标出现在1987年瑞典的一项大型研究中。这项研究对超过5万对象进行了超过15年的跟踪研究。报告开始时报告的大麻使用增加此后十五年中被诊断为精神分裂症的可能性。大麻使用得越多,被诊断为精神分裂症的可能性越高。

有趣的是,这一发现并没有刺激多少兴趣,并且在2002年以前再无类似研究出台。但是,2002年之后,许多研究探索了大麻使用和精神疾病之间的联系。2007年,一份对最佳研究的汇总发现,频繁(每日)食用大麻会导致精神病结果风险提高一倍。精神疾病的终身患病率大约为总人口的1%,因此每日使用大麻会使这一几率升至2%。

To continue reading, please log in or enter your email address.

Registration is quick and easy and requires only your email address. If you already have an account with us, please log in. Or subscribe now for unlimited access.

required

Log in

http://prosyn.org/lchmXGX/zh;
  1. Patrick Kovarik/Getty Images

    The Summit of Climate Hopes

    Presidents, prime ministers, and policymakers gather in Paris today for the One Planet Summit. But with no senior US representative attending, is the 2015 Paris climate agreement still viable?

  2. Trump greets his supporters The Washington Post/Getty Images

    Populist Plutocracy and the Future of America

    • In the first year of his presidency, Donald Trump has consistently sold out the blue-collar, socially conservative whites who brought him to power, while pursuing policies to enrich his fellow plutocrats. 

    • Sooner or later, Trump's core supporters will wake up to this fact, so it is worth asking how far he might go to keep them on his side.
  3. Agents are bidding on at the auction of Leonardo da Vinci's 'Salvator Mundi' Eduardo Munoz Alvarez/Getty Images

    The Man Who Didn’t Save the World

    A Saudi prince has been revealed to be the buyer of Leonardo da Vinci's "Salvator Mundi," for which he spent $450.3 million. Had he given the money to the poor, as the subject of the painting instructed another rich man, he could have restored eyesight to nine million people, or enabled 13 million families to grow 50% more food.

  4.  An inside view of the 'AknRobotics' Anadolu Agency/Getty Images

    Two Myths About Automation

    While many people believe that technological progress and job destruction are accelerating dramatically, there is no evidence of either trend. In reality, total factor productivity, the best summary measure of the pace of technical change, has been stagnating since 2005 in the US and across the advanced-country world.

  5. A student shows a combo pictures of three dictators, Austrian born Hitler, Castro and Stalin with Viktor Orban Attila Kisbenedek/Getty Images

    The Hungarian Government’s Failed Campaign of Lies

    The Hungarian government has released the results of its "national consultation" on what it calls the "Soros Plan" to flood the country with Muslim migrants and refugees. But no such plan exists, only a taxpayer-funded propaganda campaign to help a corrupt administration deflect attention from its failure to fulfill Hungarians’ aspirations.

  6. Project Syndicate

    DEBATE: Should the Eurozone Impose Fiscal Union?

    French President Emmanuel Macron wants European leaders to appoint a eurozone finance minister as a way to ensure the single currency's long-term viability. But would it work, and, more fundamentally, is it necessary?

  7. The Year Ahead 2018

    The world’s leading thinkers and policymakers examine what’s come apart in the past year, and anticipate what will define the year ahead.

    Order now