addictive
adj. 使人成瘾的；使欲罢不能的，使人入迷的；（人）容易沉迷的
例句
Crack is a highly potent and addictive derivative of cocaine.
强效纯可卡因是一种药效极强、容易使人上瘾的可卡因制剂。
《牛津词典》
Crack is a much cheaper, smokable form of cocaine which is powerfully addictive.
强效可卡因是一种便宜得多的可吸食性可卡因，非常容易上瘾。
《柯林斯英汉双解大词典》
It is commonly addictive and creates risks for younger users.
它通常会让人上瘾，给年轻用户带来风险。
