Hydroxypropyl Betadex destroys the intramolecular hydrogen bond by hydroxypropylation of β - CD, so that the water solubility of Hydroxypropyl Betadex is significantly improved, so that the solubility of insoluble drugs is significantly improved.Generally, high concentration of drugs in eye drops is required, and some drugs have certain irritation. Therefore, the eye tissue is very easy to produce irritation, which is a common disadvantage of eye drug delivery preparations.
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