Dr Ken Checinski, senior lecturer in addictive behaviour at St George's Hospital, London, warned me I might see effects on my skin and mood within 72 hours, even on a 5mg daily dose.

Ken Checinski医生，他是伦敦圣乔治医院的成瘾行为的高级导师，他警告我说，即使在每天5 mg的剂量下，我都能在72小时内发现药物对我皮肤和情绪的影响。

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For any behaviour to be defined as addictive, there have to be specific consequences such as it becoming the most important activity in the person's life or being the way they improve their mood.

任何可以被确定为上瘾的行为都有其具体原因，比如它变成了某个人生活中最为重要的活动或变成了他们改善自己情绪的方式。

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But the highly addictive drugs also depress appetite, and long-term use can lead to brain damage and psychotic behaviour.

但是大量成瘾可以抑制食欲，长期使用可以损害大脑和心理行为异常。

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Dr Axel Klein specialises in the study of addictive behaviour at the University of Kent.

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"Mimicking addictive behaviour in animals is much easier than mimicking depressed or schizophrenic behaviour, " said Prof Spanagel.

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Rather, they suspect that addictive behaviour is the result of the same brain chemistry that helps prevent Parkinson's.

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