single drug prescription

例句：

1. 1.The doctor prescribed a single drug for her.
   医生给她开了一种单一药物。
2. 2. She was given a single drug to treat her condition.
   她被开了一种单一药物来治疗她的病情。
3. 3.The medication should be taken as directed by the doctor, not just any single drug.
   这种药物应该按照医生的指示服用，而不是随便一种单一药物。