| Once in the water they can have diverse, subtle effects on organisms, although research is limited | [7] Most pharmaceuticals are deposited in the environment through human consumption and excretion, and are often filtered ineffectively by wastewater treatment plants which are not designed to manage them |
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| 3 For the central nervous system o 2 | Zoopharmacognosy: Animal usage of drugs and non-foods |
| Throughout the 1990s outcomes were similar | In the 1930s antibiotics emerged: first sulfa drugs, then penicillin and other antibiotics |
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| An elaborate and widely used classification system is the Anatomical Therapeutic Chemical Classification System ATC system | 17 For nutrition o 2 |
OTC medications are sold without restriction as they are considered safe enough that most people will not hurt themselves accidentally by taking it as instructed.
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