他坚信这个“处方”效果很好而且没有副作用。
He strongly believes that this "prescription" works well and has no side effects.
从某些方面来看，安慰剂是理想的药物：他们通常没有副作用，而且基本上是免费的。
In certain ways, placebos are ideal drugs: they typically have no side effects and are essentially free.
另外，音乐的提供是简单而且低廉的，并且没有副作用。
Plus, music is easy and cheap to provide, with no side effects, Bradt added.
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