Hi，

The main ingredients of HY-K1059 have limited long-term stability in aqueous solution. Minocycline, in particular, is sensitive to light and pH and easily degrades. After combining, refrigeration or even freezing is required, which may shorten the shelf life (powder: -20°C, 3 years; solution: -20°C, 6 months). To prevent interaction or decomposition of the active ingredients in solution and to improve storage stability, we package the active ingredients separately. Therefore, we recommend dissolving the active ingredients in liquid form as needed before storage.

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