The net profit margin ratio is a profitability ratio. Essentially, it's the percentage of profit from business operations after you've deducted business operating expenses, interest expense, taxes and preferred stock dividends from revenues. Common stock dividends are the only major debit item left out of the equation.
Severe Allergic Reaction Facts. Anaphylaxis is a severe allergic reaction that occurs rapidly and causes a life-threatening response involving the whole body. This reaction can lead to difficulty breathing and shock ultimately leading to death. For an anaphylactic reaction to occur, you must have been exposed in the past to the substance that causes the reaction, called the antigen. A bee sting, for example, may not cause an allergic reaction the first time.
The most common causes of anaphylactic reactions include: 1  certain foods (including peanuts, tree nuts or shellfish) â however, all foods can potentially cause anaphylaxis).2  insect stings. 3  drugs and contrast agents (used in some x-ray tests), particularly those given by injection.he symptoms of anaphylaxis often occur with more mild symptoms of an allergic reaction. However, in some cases, mild symptoms such as an allergic rash (hives or urticaria) may not be present, and the first symptoms seen are those of a severe reaction.