This is not a correct answer.  Interruption of the propagation of the electrical potential is caused by agents that can block or interfere with the sodium and potassium channels and sodium-potassium pump. This will weaken, slow, or completely interrupt the movement of the electrical potential. Blocking receptors will prevent the continuation of the transmission of information; however, this has nothing to do with the movement of the electrical impulse down the axon to the pre-synaptic membrane.