A device that is used to reduce the pain of a needle stick to a person, the device having a casing containing a vibratory device and a temperature reducing device, and a method for using the device to reduce the pain of a needle stick by applying both thermal and vibration analgesia to a subject during a needle stick. The weathering degree of coal is evaluated by using the surface tension of semicoke which is prepared by performing a heat treatment on weathered coal as an index. The medicated module also contains a needle guard that engages a housing of the reservoir to open the slit valves. The suction mechanism is disposed in the middle of the suction duct. The valve has improved longevity and reliability.