nitrofurantoin

例句：

1. 1. This medication is used to treat chronic pain.
   这种药物用于治疗慢性疼痛。
2. 2. The patient was given the medication as prescribed by the doctor.
   患者按照医生的处方服用了这种药物。
3. 3.The drug has been shown to be effective in treating certain types of cancer.
   这种药物已被证明对某些类型的癌症有效。