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Storage conditions: The raw materials should be stored away from light in an inert atmosphere at -20C to prevent moisture absorption and chemical degradation

Another essential aspect that influences how well a drug performs after intranasal administration is the zeta potential, which indicates the nanoparticles surface charge and predicts its long-term physical stability

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However, persistent burning, stinging, or increasing irritation suggests the concentration may be too high or your skin needs more time to adjust