Atonicity is the most common cause of PPH. Any drug which increases the tone of uterus or the force of contraction is used to control PPH and is called oxytocic. Commonly used oxytocics in the management of PPH are:Oxytocin Methergin Syntometrine – oxytocin + methergin 15 methyl PGF2a (carboprost) Misoprostol (PGE1)