during a period of single stimulus pulses to the lot , local anesthetics and barbiturates , applied to the incubating solution , depressed the amplitude of the action potential ( while increasing its latency and threshold ) with the following potencies : tetracaine greater than cocaine greater than lidocaine greater than procaine greater than pentobarbital greater than phenobarbital .
C0004745
barbiturates
C0030883
pentobarbital