Abstract: A syringe apparatus (10) comprising: a syringe barrel (12), a plunger apparatus (11) with, resealable injection port (18) thru which multiple syringes with needle prefilled with intraveinous medication are injected into syringe chamber (22) which is prefilled with a diluent. The medications are mixed to the appropriate endotracheal administration concentration and volume, then discharged through discharge valve assembly (26) comprising a one-way valve (28) and twist lock discharge port (30). Syringe apparatus (10) is connected to an endotracheal tube with needleless medication injection port, or other device, and the medication is forcefully expelled to the respiratory passageways and absorbed by the pulmonary vasculature. Syringe apparatus (10) can mix medications from needleless syringes by attachment to double female adaptor apparatus (34). Syringe apparatus (10) can be used to mix any liquid medicants that need to be injected into any device that requires administration by a syringe.