Do not come off antibiotics before completing the full course of treatment; otherwise,it may lead to germ's resistance to this medicine.如何翻譯?

服抗生素要完成整個療程;否則可導致細菌抗藥性.
gerund is the ---ing form of a verb used as a noun;completing.

Do not come off antibiotics before completing the full course of treatment; otherwise, it may lead to germ's resistance to this medicine.
在完成整個療程前，不要中斷(come off)服用抗生素; 否則，此舉將導致病菌產生抗藥性。

1.) Do not come off antibiotics... 是祈使句
= You should not come off antibiotics...

2.) ... before completing the full course of treatment
= before you complete the full course of treatment...
before 一般接子句，也可接分詞片語

3.) come off 依前後文有許多意思，句中是"中斷，停止" 的意思
[TRANSITIVE] come off something to stop taking something such as a medicine or drug
She’d been advised to come off the medication immediately.
http://www.macmillandictionary.com/dictionary/british/come-off