Don't take this medicine unless it's absolutely necessary.
非万不得已不要用这种药。
I guarantee that if you take this medicine, you'll soon get well.
我管保你吃了这药就好。
You must remind him to take his medicine, in case he forgets.
你要钉着他吃药，别让他忘了。
Take this medicine regularly, it will safeguard you against a return of the disease.
定期服用这种药，它能防止你旧病复发。
The child refused to take the medicine and bent backwards in his mother's arms.
这孩子怕吃药，在妈妈的怀里直打挺儿。