Prescription drug

Where is Iva Annua Var. Annua Pollen and Iva Xanthifolia Pollen made?

1 company sell it under their own name. None of their labels names the factory.

Companies and their factories

Company on the labelFactoryWhereLast FDA inspection
Antigen Laboratories, Inc. Marsh Elder Mixture0.01 g per 1 mL, 0.025 g per 1 mL · NDC 49288-0268, 49288-0267The label doesn't name the factory. Plants this company names for other drugs