Can Zuguang Powder still be used one year after its expiration date?

Under normal circumstances, it is not recommended to use Zuguang Powder one year after its expiration date. It may only be cautiously considered in special emergencies if there are no signs of deterioration, but this is still not advised. If in doubt, it is recommended to consult a healthcare professional in advance. The detailed analysis is as follows:

If the Zuguang Powder has been expired for one year but the packaging remains intact and the powder shows no clumping, discoloration, or unusual odor—indicating no visible signs of deterioration—it might be cautiously used in emergency situations where no alternative medication is available. However, even if the appearance seems normal, the active ingredients may have degraded, making it less effective or ineffective in treating conditions such as athlete's foot.

If, after one year past the expiration date, the Zuguang Powder shows damaged packaging, clumped or discolored powder, or an unusual smell, or if alternative medications are available under normal circumstances, it must absolutely not be used. Deteriorated medication may produce harmful substances that could irritate the skin, causing redness, itching, stinging, or other discomforts, and may even worsen existing conditions, posing risks to skin health.

When purchasing Zuguang Powder, always check the expiration date and avoid excessive stockpiling. Expired medications should be disposed of promptly and not kept. Always confirm that the medication is within its shelf life and shows no signs of deterioration before use. Seek medical attention immediately if any adverse reactions occur.