Health 8_Drug Addiction

Which drug is often used in hospitals for pain but is addictive?
下列何者是醫療常使用的止痛劑，同時也具成癮性，屬於醫院的管制藥品？

Morphine is addictive, so it cannot be used to treat illness.
嗎啡雖然能止痛但是成癮性很強，因此不可以拿來治病。

Which drug may be illegally added to diet pills?
來路不明的減肥藥可能違法添加下列何種毒品造成上癮？

Long-term use of which drug may cause infertility?

長期使用何種毒品容易造成不孕？

Which drug was first an anesthetic?
何種毒品原本為麻醉劑，後被濫用？