A method of reducing inflammation in a variety of disorders by using an intraperitoneal solution of magnesium. The solution can be used for treating inflammatory and inflammation-related disorders in animals and/or humans. Application of the solution reduces inflammation and thereby assists in the healing process. An alternative method involves the intraperitoneal administration of a solution containing magnesium salts. Another alternative method provides for treatment of inflammatory and inflammation-related disorders in animals by way of intraperitoneal administration of a solution containing magnesium salts, methenamine or its salts and dextrose. The method further provides the use of methenamine or its salts and/or dextrose in combination with magnesium.