title: Alpha-2 agonists as analgesics.
mesh_terms: D000316:Adrenergic alpha-Agonists / Q000494:pharmacology / Q000627:therapeutic use*; D003000:Clonidine / Q000494:pharmacology / Q000627:therapeutic use; D004723:Endorphins / Q000378:metabolism; D006143:Guanabenz / Q000494:pharmacology / Q000627:therapeutic use; D006801:Humans; D010146:Pain / Q000188:drug therapy*
chemical_list: D000316:Adrenergic alpha-Agonists; D004723:Endorphins; D006143:Guanabenz; D003000:Clonidine