5 action determine drug expired 
 
 
Liu Jue Wuhan, hubei province center hospital medicine division 
 
 
China's traditional Chinese medicine to 

        If before the drug can the validity of the check boxes, means that you have good drug habits, however, you do the right first step, because changes in storage conditions, light and high temperature can let shorten the validity of drugs after opening, shall regularly check box at ordinary times, the good preventive medicine metamorphism of the second level. Through a few small methods can preliminarily determine whether the drug expired. 
 
        See: drug presence of color, suitable for all kinds of drugs. White tablets become yellow, black, red, or mildew or spots, all said drug has deterioration failure, do not suit again. Such as vitamin C oxidized easily change from white to yellow. It fails the outer icing often burst, plaque or spots, will happen autolyzed, black, or moldy. Apparent dry eye ointment and other ointment, thinned, discoloration, oil water separation, etc., it cannot be used again. 
 
        Pinch: capsule can easily be affected with damp be affected with damp, holding such as feeling have obvious softening, rupture, oil, etc., shall not take. 
 
        Smell: the suppository, tablet, capsule, etc., have smell smell or odor. Aspirin tablets after be affected with damp be affected with damp will produce strong acidity, increase of gastrointestinal tract irritation, so not take again. Granulation, granule and syrup failure often appear when smell, such as fermentation flavor, smell. Capsule usually it is very difficult to judge whether the metamorphism from color, but if the smell of the oil, it is best not to take. 
 
        Touch: sugar pill or capsule, if the drug mutual adhesion to the touch, will not take. 
 
        Shake: suspension, oral liquid, syrup, eye drops, nasal drop, shake whether there is precipitation, such as liquid crystal, floc or cloudy, it cannot be used again. 
 
        Drug easily affected by light, temperature, humidity, microbes and destruction, once after opening, it is better to put in a cool and dry place. Prohibited in damp places, such as bathroom, kitchen. Drug after opening out as far as possible for short periods of time, if long-term storage is required, to note the kaifeng time on the packaging, so that the next time when used to determine whether expired.
 
 
 
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