Indapamide bisoprolol transdermal patch and preparation method thereof
A technology of bisoprolol and indapamide, which is applied in the field of medicine and can solve problems such as lack and hindering the research and development of transdermal patches
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Embodiment 1
[0022] 2 g of bisoprolol fumarate was dissolved in 5 ml of distilled water, and 20% (w / v) sodium carbonate aqueous solution was added dropwise until no oily liquid was produced. Use 240ml of ethyl acetate to extract three times, combine the extracts, add an appropriate amount of anhydrous sodium sulfate for dehydration, and then dry by rotary evaporation to obtain bisoprolol free base.
Embodiment 2
[0024] Dissolve 0.1 mol of bisoprolol free base in 40 ml of acetone, add 0.05 mol of maleic acid under stirring, continue to stir for 2 hours, and dry the solvent by rotary evaporation to obtain the bisoprolol maleate ion-pair complex.
Embodiment 3
[0026] Dissolve 0.1 mol of bisoprolol free base in 40 ml of acetone, add 0.05 mol of fumaric acid under stirring, continue to stir for 2 hours, and spin evaporate to dry the solvent to obtain the bisoprolol fumarate ion-pair complex.
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