<prompt> Mechanism of action of dantroline is ?Inhibits Ca secretion from sarcoplasmBinds to ryanodine receptors to block release of CaInhibits GABAInhibits Gamma motor neuron  <response>: Ans. is b i.e., Binds to ryanodine receptors to block release of Ca o Dantrolone acts on Ryanodine receptors RyR Calcium channels in sarcoplasmic reticulum of skeletal muscles and prevents their depolarization triggered opening -- no release of intracellular Ca-2 -- No excitation contraction coupling -- No contraction. 