另外，如果一种药物不起作用，患者应该积极尝试另一种。
In addition, if one medication does not work, patients should be open to trying another.
研究者称，病人对于药物不起作用的信念确实能够成为自我实现的预言。
A patient's belief that a drug will not work can become a self fulfilling prophecy, according to researchers.
许多药物可能不起作用，或者可能有危险的副作用。
Many of them may not work or may have side effects that can be dangerous.
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