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“ Tetracaine , in high concentrations, reduces the response to potassium , whereas it reduces the response to veratridine at much lower concentrations.”
Naunyn-Schmiedeberg's Archives of Pharmacology • 2004 | View Paper
“When present for one minute, tetracaine (1 mm) moved the potassium activation curve to higher, and the potassium inactivation curve to lower, potassium concentrations.”