Risk. The use of vitamins is not considered to cause any environmental impact.
The information comes from Fass.
Fass environmental information
Fass environmental information for Cernevit (contains, among other things, thiamine) from Baxter (downloaded 2023-03-16).
According to the European Medicines Agency guideline on environmental risk assessments for pharmaceuticals (EMA/CHMP/SWP/4447/00), vitamins, electrolytes, amino acids, peptides, proteins, carbohydrates, lipids proteins, vaccines and herbal medicinal products are exempted because they are unlikely to result in significant risk to the environment.
Author: Health and Medical Care Administration, Region Stockholm