There is no known problem with taking two types of insulin made by different manufacturers. In fact, NPH may be mixed in the same syringe with any type of rapid-acting insulin, even if the two are made by different manufacturers. It is also permissible to take a long-acting insulins (glargine, detemir) and a rapid-acting insulin made by a different manufacturer, but they should not be mixed together in the same syringe.
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