This invention provides novel methods and compositions for treating and preventing seizures by administration of ASIC1a receptor activating compounds. A novel method of assaying ASIC1a receptor activating compounds is included in the present invention. According to the invention applicants have demonstrated that seizure duration, intensity, and progression may be modulated by administration of an ASIC1a receptor activator which acts to increase the endogenous activity of ASIC1a receptors to mediate the effects of low pH in the CNS. The inventors have also found that the ASIC1a receptor activator may prevent such seizures altogether.