A needle guard for a syringe including tabs and preferably springboards disposed on the needle guard configured to engage a luer lock to prevent rotation of the luer lock during needle exchange. The adjuvant agent contains 50 to 90 wt % cordyceps sinensis, and also contains 10 to 50 wt % astragalus membranaceus. Digitized voice waveform data are processed to determine the voice commands of the user. The guide rail, in cooperation with the first and the second guide features, initially guides the sliding window panel to an offset position relative to the fixed window panel, and then guides the sliding window panel in a lateral direction to uncover an opening in the fixed window panel.