Prescription drug

Where is Quercus Alba Pollen made?

3 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. White Oak Pollen1 g per 20 mL · NDC 54575-978The label doesn't name the factory. Plants this company names for other drugs
Antigen Laboratories, Inc. White Oak0.050 g per 1 mL, 0.1 g per 1 mL · NDC 49288-0351, 49288-0350The label doesn't name the factory. Plants this company names for other drugs
Nelco Laboratories, Inc. White Oak0.05 g per 1 mL, 0.1 g per 1 mL, 10000 [PNU] per 1 mL, 20000 [PNU] per 1 mL, 40000 [PNU] per 1 mL · NDC 36987-2898, 36987-2899, 36987-2900 +5The label doesn't name the factory. Plants this company names for other drugs