This chapter presents information on neonatal drugs that begin with D, including use, pharmacology, adverse effects, fetal and infant implications of maternal treatment, treatment, and supply of Dalteparin, Dexamethasone, Diamorphine (heroin), Diazepam, Diazoxide, Digoxin, Digoxin-specific antibody, Dihydrocodeine, Dobutamine, Domperidone, Dopamine, Dornase alfa (recombinant human DNase), and Doxapram