This invention is related to carbocyclic and heterocyclic substituted semicarbazones and thiosemicarbazones represented by Formula I: ##STR1## or a pharmaceutically acceptable salt or 
prodrug thereof, wherein: Y is 
oxygen or 
sulfur; R.sub.1, R.sub.21, R.sub.22 and R.sub.23 are independently 
hydrogen, 
alkyl, cycloalkyl, alkenyl, alkynyl, haloalkyl, 
aryl, aminoalkyl, hydroxyalkyl, alkoxyalkyl or carboxyalkyl; or R.sub.22 and R.sub.23, together with the N, form a heterocycle; A.sub.1 and A.sub.2 are independently 
aryl, heteroaryl, saturated or partially unsaturated carbocycle or saturated or partially unsaturated heterocycle, any of which is optionally substituted; X is one or O, S, NR.sub.24, CR.sub.25 R.sub.26, C(O), NR.sub.24 C(O), C(O)NR.sub.24, SO, SO.sub.2 or a 
covalent bond; where R.sub.24, R.sub.25 and R.sub.26 are independently 
hydrogen, 
alkyl, cycloalkyl, alkenyl, alkynyl, haloalkyl, 
aryl, aminoalkyl, hydroxyalkyl, alkoxyalkyl or carboxyalkyl. The invention also is directed to the use of carbocycle and heterocycle substituted semicarbazones and thiosemicarbazones for the treatment of 
neuronal damage following global and focal 
ischemia, for the treatment or prevention of neurodegenerative conditions such as 
amyotrophic lateral sclerosis (ALS), for the treatment and prevention of otoneurotoxicity and eye diseases involving glutamate 
toxicity and for the treatment, prevention or amelioration of pain, as anticonvulsants, and as antimanic depressants, as local anesthetics, as antiarrhythmics and for the treatment or prevention of 
diabetic neuropathy and 
urinary incontinence.