Prescription drug

Where is Ambrosia Artemisiifolia Pollen and Ambrosia Psilostachya Pollen and Ambrosia Trifida Pollen made?

2 companies sell it under their own name. None of their labels names the factory.

Companies and their factories

Company on the labelFactoryWhereLast FDA inspection
Allergy Laboratories, Inc. 3-Ragweed Mix, Giant/Short/Western Pollen0.33 g per 20 mL / 0.34 g per 20 mL · NDC 54575-153The label doesn't name the factory. Plants this company names for other drugs
Antigen Laboratories, Inc. Short/Giant/Western Ragweed Mixture0.0167 g per 1 mL · NDC 49288-0456The label doesn't name the factory. Plants this company names for other drugs