Preparation method of pharmaceutical composition capable of improving safety of compound folium ginkgo injection

[0026]

[0027] Preparation method: Ginkgo biloba leaves and Acanthopanax add water to decoct twice, each time for 2 hours, combine the decoction, filter, and concentrate the filtrate under reduced pressure to a relative density of 1.27-1.30 (80°C), let it cool, add ethanol to make the containing The amount of ethanol is 65%, stand overnight, filter, the filtrate recovers ethanol under reduced pressure and concentrates to a relative density of 1.30 (80°C), add 3 times the amount of water, stir well, refrigerate for 48 hours, filter, and concentrate the filtrate under reduced pressure When the relative density is about 1.15 (80°C), the medicinal liquid is used for later use; the leech is decocted twice, each time for 1 hour, and the decoction is combined, filtered, and the filtrate is concentrated to a relative density of 1.25-1.30 (80°C), and let cool , add ethanol so that the ethanol content is 65%, let it stand overnight, filter, the filtrate is concentrated under reduced pre

[0029]

[0030] Preparation method: Ginkgo biloba leaves and Acanthopanax add water to decoct twice, each time for 2 hours, combine the decoction, filter, and concentrate the filtrate under reduced pressure to a relative density of 1.27-1.30 (80°C), let it cool, add ethanol to make the containing The amount of ethanol is 65%, stand overnight, filter, the filtrate recovers ethanol under reduced pressure and concentrates to a relative density of 1.30 (80°C), add 3 times the amount of water, stir well, refrigerate for 48 hours, filter, and concentrate the filtrate under reduced pressure When the relative density is about 1.15 (80°C), the medicinal liquid is used for later use; the leech is decocted twice, each time for 1 hour, and the decoction is combined, filtered, and the filtrate is concentrated to a relative density of 1.25-1.30 (80°C), and let cool , add ethanol so that the ethanol content is 65%, let it stand overnight, filter, the filtrate is concentrated under reduced pre

[0032]

[0033]Preparation method: Ginkgo biloba leaves and Acanthopanax add water to decoct twice, each time for 2 hours, combine the decoction, filter, and concentrate the filtrate under reduced pressure to a relative density of 1.27-1.30 (80°C), let it cool, add ethanol to make the containing The amount of ethanol is 65%, stand overnight, filter, the filtrate recovers ethanol under reduced pressure and concentrates to a relative density of 1.30 (80°C), add 3 times the amount of water, stir well, refrigerate for 48 hours, filter, and concentrate the filtrate under reduced pressure When the relative density is about 1.15 (80°C), the medicinal liquid is used for later use; the leech is decocted twice, each time for 1 hour, and the decoction is combined, filtered, and the filtrate is concentrated to a relative density of 1.25-1.30 (80°C), and let cool , add ethanol so that the ethanol content is 65%, let it stand overnight, filter, the filtrate is concentrated under reduced pres