convulsant

Bicuculline is an alkaloid extracted from Corydalis decumbens, acting as a competitive antagonist of the neurotransmitter GABAA receptor (IC50 = 2 μM). It also blocks Ca2+-activated potassium (SK) channels and inhibits slow afterhyperpolarization (slow AHP). Bicuculline has anticonvulsant effects and is commonly used to establish mouse seizure models.

Bicuculline methochloride is a competitive GABAA receptor antagonist and allosteric inhibitor with an IC50 of 1.7 μM. It blocks Ca²⁺-dependent activation of potassium channels, exhibits convulsant activity, and is suitable for epilepsy research.