The action of histamine on procaine block in frog nerves.
D000818:Animals; D001001:Anura; D006632:Histamine; D018494:Histamine Agents; D011343:Procaine / Q000037:antagonists & inhibitors*
D018494:Histamine Agents; D011343:Procaine; D006632:Histamine
HISTAMINE/effects; PROCAINE/antagonists