Expectorant drugs (increase respiratory tract fluid除痰剂) Cathartics or laxatives (evacuate the boweli泻药) Other drugs decrease the flow of urine, diminish body secretions,or induce constipation(便秘)• Expectorant drugs (increase respiratory tract fluid除痰剂) • Cathartics or laxatives (evacuate the bowel泻药) • Other drugs decrease the flow of urine, diminish body secretions, or induce constipation (便秘)