title: The procaine "youth" drugs.
mesh_terms: D000368:Aged; D000375:Aging / Q000187:drug effects*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004338:Drug Combinations / Q000627:therapeutic use; D005260:Female; D006415:Hematoporphyrins / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D011343:Procaine / Q000627:therapeutic use*
chemical_list: D004338:Drug Combinations; D006415:Hematoporphyrins; C033990:K.H.3; C004936:Gerovital H3; D011343:Procaine