VOA常速英語：美國(guó)老年人使用大麻緩解疼痛，對(duì)抗失眠

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Once stigmatized and banned across the United States, marijuana is now legalized in many parts of the country, primarily for medicinal use, but increasingly also for recreation. As cannabis becomes mainstream, Americans in their 70s and 80s who used to get high on marijuana in their youth, are now using cannabis-infused products to relieve old age aches and pains. VOA's Zlatica Hoke has this report.