“Afterlife” describes the drug (or the chemicals resulting from the drug) after it has been used in humans or animals and is excreted. Pharmaceuticals or their byproducts are found when testing waterways relatively often. Which can harm the ecosystem and also poise issues for water treatment.
Like a big one I know is that steroid byproducts from contraceptives (such as birth control) seem to interfere with the development of young fish and aquatic amphibians like frogs.
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