在只使用一种药物时，更可能发生耐药性。

Resistance is more likely to occur when only one drug is used.

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此外，当两种药物联合使用时，其中每一种药物所需要的剂量通常比单独使用一种药物时要小一些。

Furthermore, the doses needed when two agents are combined are generally lower than those required when the components are used as single agents.

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“通过在存储记忆的大脑的特定区域中使用一种药物，记忆是可以被消除的，”他在电话采访中说：“长期记忆是可以被消除的。”

"Memory can be erased by applying a drug into a specific part of the brain that stores that memory," he said in a telephone interview. "Long-term memory can be erased."

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