| 摘要 |
This invention relates to certain stable microsphere compositions containing a fat, a wax or a mixture thereof; and an active ingredient selected from LL-F28249 alpha - lambda , compounds, 23-oxo or 23-imino derivatives of LL-F28249 alpha - lambda compounds, milbemycin compounds and avermectin compounds. The invention also relates to a method for introducing and maintaining levels of the active compound in the blood of warm-blooded animals for extended periods of time and for the prevention or treatment of infections and infestations caused by helminths, nematodes, acarids and endo- and ectoparasitic arthropods in warm-blooded animals by the parenteral administration of compositions of the invention. |
