Powerful insect repellent for veterinary use and preparation method thereof
A drug and powerful technology, applied in the field of pharmaceutical preparations, to achieve the effects of reducing toxic and side effects, easy to use, and improving the effect of insect repellent
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[0029] Example 1: The components of the required medicine are: 8 parts of Tripterygium wilfordii, 20 parts of Sophora flavescens, 15 parts of Shi Junzi, 15 parts of Lei Wan, 20 parts of rhubarb, 12 parts of licorice, and 10 parts of β-cyclodextrin.
[0030] Its preparation method is as follows:
[0031] (1) Extraction and separation of components of Tripterygium wilfordii: put the weighed tripterygium wilfordii into an extraction tank, add 2 times the amount of water, soak for 12 hours at 45°C-55°C, filter, and keep the filtrate for later use; then Add 1 times the amount of water and continue soaking under the same conditions for 6 hours, then filter. The filtrates are combined and concentrated until the relative density of the extract is 1.05-1.15. Put the concentrated liquid into the ethanol precipitation tank for ethanol alcohol precipitation, control the ethanol concentration to 65%-70%, stir evenly, let it stand for 6 hours, then filter it, and keep the filtrate for lat...
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