medications lyophilized medications medication cocktails or the like and such are contemplated as being within the scope of the term u201c liquid u201d as used herein in preferred embodiments the liquids used in accordance with the present invention are de gassed prior to filling into the needle less injector or are of sufficient chemical properties such that the liquids de gas immediately upon or soon after filling as described in u s patent application ser no 09 808 511 filed mar 14 2001 in either of such preferred embodiments substantially no gas pocket develops in the interior cavity where the liquid resides during storage of the needle less injector prior to use for ease in describing the various elements of the instant invention the following spatial coordinate system will apply thereto as depicted in fig1 c a central axis is defined through the length of a gas pressured needle less injector 100 this central axis 1 has one terminus at the proximate end 2 of the needle less injector 100 defined as that end of the device in contact with an injection surface during normal operation of the injector the other terminus of the central axis is at the distal end 3 of the injector 100 defined as that end of the.