The medicated solution is drawn with a suitable injector and a syringe needle, inserted quickly to the subcutaneous region of an acupoint and pushed it slowly to a certain depth. When the needling sensation (such as aching and distention) is induced, the syringe needle is withdrawn a little and the medicated solution is injected if there is no blood drawn into the injector. For the patients with deficiency syndrome or poor constitution, the speed of injection should be slow; while for the patients with excessive syndrome or good constitution, the injection can be quickened appropriately.
The injection dose for each acupoint depends on the location of the acupoint, pathological conditions of the patient and the concentration of the medicated solution. Generally speaking, the injection dose for the acupoints located on the head and face is 0.3 - 0.5 ml, for those located on the chest and back region is 0.5 - 1 ml, and for those located on thick muscles of the limbs, waist and but-rocks is 2 - 5 ml. For injection with small dose, the dose is 1/10 - 1/2 of the original dose of medicated solution. Usually the injection can be given once a day or once every other day. Six to eight times make up one course of treatment. For the treatment of emergent syndromes, the injection is given once or twice a day.