off label use meaning in Chinese

《英汉医学词典》off label use

药品核准标示外使用

Examples

1. but 2 recent studies question the safety of off label use of drug treated stands ( stents )
   但是最近2个报告置疑无标签使用药物支架的安全性。
2. but some doctors use drug aluting ( eluting ) stands ( stents ), as they are called, for patients with more serious heart problems, this is known as off label use and is permitted
   但是有些医生使用（他们称之为）药物(洗脱)支架在那些有严重心脏问题的病人身上，这是他们都知道的无标签使用。