Generally ,what is the expiration duration for Neomycin/polymyxin B/bacitracin powder nebasulf sprinkling powder using for burns and cuts? Is it harmful if use it after expiry? Actually I have powder in house but expiry date was wipe out on bottle so not able to decide whether use or not?
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Dear, expire duration is ranges from 6 month to 1 year. These drugs are generally used for local application on skin. No drug is recommended to be used after expiry date however if somebody has to use these drugs after expiry period it may be well understood that the effectiveness after expiry of these drugs is reduced and good results cannot be obtained.
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Hye. In general, all drugs or topical ointments etc degrade over a period of time. Normally, the expiry date is decided based on the time required for the drug to degrade to 90% of its initial efficacy. Therefore, in most cases if the drug is slightly beyond the expiry date, the drug will either show normal effect or show no effect due to the lack of enough potency to cure the ailment.� Of course in certain situations, the degradation products may cause severe reactions when consumed or applied. Since you are not sure about the expiration date, the best thing to do is avoid using the medication.
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