efficacious

这种药物在治疗头痛方面非常有效。

This medicine is highly ___efficacious in treating headaches.

一杯加了蜂蜜的新鲜姜茶对她喉咙痛的效果，比任何非处方糖浆都更灵验。

A cup of fresh ginger tea with honey proved more ___efficacious for her sore throat than any over-the-counter syrup.

理疗方案对她受伤肩膀的活动能力恢复效果显著。

The physical therapy program was remarkably ___efficacious in restoring full mobility to her injured shoulder.