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Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
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Related Experiment Video

Updated: Apr 27, 2026

Protocol for Acute and Chronic Ecotoxicity Testing of the Turquoise Killifish Nothobranchius furzeri
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Beta-blockers in the environment: part II. Ecotoxicity study.

Joanna Maszkowska1, Stefan Stolte2, Jolanta Kumirska1

  • 1Department of Environmental Analysis, Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland.

The Science of the Total Environment
|July 1, 2014
PubMed
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Beta-blockers (BB) are increasingly found in ecosystems. While harmful to aquatic organisms like green algae, environmental risks are minor due to sorption inhibiting hazardous effects.

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DuckweedGreen algaeSoil and marine bacteria

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Area of Science:

  • Environmental Science
  • Ecotoxicology
  • Pharmaceuticals

Background:

  • Increasing environmental presence of beta-blockers (BB) due to widespread consumption.
  • BB are generally safe for human and veterinary use but pose potential ecological risks.
  • Study focuses on propranolol, metoprolol, and nadolol ecotoxicity.

Purpose of the Study:

  • To evaluate the ecotoxicity of selected beta-blockers (propranolol, metoprolol, nadolol).
  • To assess the impact of these BB on organisms across different trophic levels.
  • To determine the environmental risk considering sorption effects.

Main Methods:

  • Utilized a flexible ecotoxicological test battery.
  • Included marine bacteria (Vibrio fischeri), soil/sediment bacteria (Arthrobacter globiformis), green algae (Scenedesmus vacuolatus), and duckweed (Lemna minor).
  • Instrumental analysis confirmed actual test concentrations against nominal values.

Main Results:

  • Propranolol and metoprolol showed potential harm to green algae (S. vacuolatus).
  • Nadolol's ecotoxicity was not detailed but implied to be assessed.
  • Sorption significantly inhibited the hazardous effects of the tested BB.

Conclusions:

  • Beta-blockers like propranolol and metoprolol can be harmful to aquatic organisms.
  • Sorption plays a crucial role in mitigating the environmental risks of BB.
  • The overall environmental risk posed by these BB is considered minor.