Disclosed herein are pharmaceutical compositions in the form of a suspension for oral delivery. Some embodiments provide a pharmaceutical composition in the form of a suspension for oral delivery comprising an anti-cancer active pharmaceutical ingredient; water; a suspending agent; a buffering agent; and one or more of a wetting agent and a binder/filler. In some embodiments, the anti-cancer active pharmaceutical ingredient is selected from ibrutinib, nilotinib, dasatinib, sunitinib, sorafenib, erlotinib, and capecitabine.