There are two main classification of drugs that act on the uterus; the uterine stimulants and relaxants. This is discussed in detail in this video along with its pharmacotherapy and adverse effects. Timeline: 0:00 Classification of drugs acting on uterus 0:30 Uterine Stimulants 0:39 Uterine Relaxants 1:00 Oxytocin 5:52 Ergot Derivatives 7:20 Prostaglandins 9:00 Tocolytics