Prescription drug

Where is Acer Rubrum Pollen and Acer Saccharinum Pollen and Acer Saccharum 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. Maple Mix, Red/Silver/Sugar Pollen0.33 g per 20 mL / 0.34 g per 20 mL · NDC 54575-943The label doesn't name the factory. Plants this company names for other drugs
Antigen Laboratories, Inc. Maple Pollen Mixture0.0067 g per 1 mL, 0.0167 g per 1 mL · NDC 49288-0309, 49288-0308The label doesn't name the factory. Plants this company names for other drugs