Prescription drug

Where is Ambrosia Artemisiifolia 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. Standardized Ragweed Mix, Giant/Short0.5 g per 20 mL · NDC 54575-170The label doesn't name the factory. Plants this company names for other drugs
Antigen Laboratories, Inc. Treatment Set TS345268, Short/Giant Ragweed Mixture0.01 g per 1 mL / 20000 [AU] per 1 mL, 0.025 g per 1 mL · NDC 49288-0843, 49288-0454The label doesn't name the factory. Plants this company names for other drugs