The invention relates to an apparatus and a method for simultaneous multiple medicine administration. Apparatus and systems for simultaneous multiple medicine administration of prior art have the disadvantage of medicine flow rates being dependent on each other i.e. changing a particular flow rate leads to a change in the other flow rates. Moreover, the changed flow rate does not reach a set value in a short period of time but fluctuates around the set value for an undesired long period of time. This results in a wrong dosage of all medicines, if the flow rate of one medicine is adjusted, and can cause a serious damage to a patient since some medicine have a very narrow therapeutic range of safety. The apparatus according to the invention eliminates this disadvantage and provides an almost exact dosage when administering multiple medicines simultaneously. The apparatus according to the invention comprises a housing in which at least two entry chambers and a collecting point are formed, wherein each entry chamber communicates with the collecting point via a flow path respectively and wherein in each flow path at least one penetration member is arranged, which causes a decrease in pressure downstream the penetration member with respect to the pressure upstream the penetration member. According to the method of the invention the independency of flow rates is eliminated irrespective of the equipment that is used, wherein a fluid is fed to a collecting point via separate flow paths and at least one penetration member is arranged within each flow path causing a decrease in pressure downstream the penetration member with respect to the pressure upstream the penetration member. The fluids eventually converge at the collecting point.
