A medicament dispensing system for orally dispensing medicament to a patient in particular an infant or child, without spillage nor contamination of the medicament by the direct introduction of the syringe into the vial, wherein the system comprises in combination a syringe to extract medicament, an adapter to be inserted tightly into the medicament container and serve as an airtight inner cap thereof to avoid the spillage of the medicament and its contamination by exposure to the environment, as well as to serve as a guide for the syringe； and a housing or hood for containing and storing in a sterile manner said syringe and adapter, wherein the plunger of said syringe comprises four ridges arranged orthogonally equidistantly from each other about the same, wherein the front ends or tips of said ridges coincide with the outer diameter of the plunger head, said front ends have the function of preventing the oscillation or pitching of the piston, thereby ensuring the hermetic seal of the tip relative to the smooth inner surface when the medicament is extracted and thereby preventing the loss of vacuum, said plunger head having a thickness with a dimension such a dimension that the outer edge of said head has a contact surface with a precision in thousandths of a millimeter for dispensing the medicament and to run the entire inner surface of the syringe without losing tightness along the entire length of the cylindrical body, sliding smoothly and without leaving residues in the internal wall of the syringe.
