Diltiazem suna ne da ke nufin wani magani da ake amfani da shi don magance hawan jini da wasu cututtukan zuciya irin su angina (ciwon kirji) da wasu nau'in arrhythmia ( bugun zuciya da ba daidai ba). Diltiazem yana aiki ne ta hanyar shakatawar magudanar jini da kuma ƙara yawan jini, wanda ke taimakawa wajen rage hawan jini da rage yawan aiki a zuciya. Yana cikin rukunin magungunan da ake kira calcium channel blockers.