injection needle 204 into the body 214 with reference to fig2 i the withdrawal spring 230 rotates both the bottom arm 228 of the main spring and the top arm 212 of the main spring about the axle 232 rotation of the top arm 212 of the main spring pulls the plunger 206 upward the interlocking spring 234 latches plunger 206 to the cylinder 202 pulling the plunger 206 upward also pulls the cylinder 202 upward since the injection needle 204 is connected to the cylinder 202 the injection needle 204 is withdrawn completely into the body 214 of the device 238 an embodiment of a single dose palm controlled injector of the invention is now disclosed daily home based administration of medications has gained widespread use including growth hormones insulin heparin antibiotics ivf hormones for example caregivers and patients are often intimidated by the stab like motion of the injection and the pain inflicted thereby consequently there is reluctance and commotion associated with administration of injections using known injectors in many households the single dose palm controlled injector of the invention employs a palm controlled method of injection as well as u201c pain gate u201d activation features to provide a more comfortable experience of needed injections with reference to fig3 a a syringe 300 having a plunger 302 a cylinder 304 and an injection needle 306 is releasably and slidably held by syringe holders 308 the.