Final answer:
The nurse should teach the client with asthma that salmeterol is for long-term control and should not be used for acute attacks or discontinued when symptoms improve, as it functions to promote bronchodilation.
Step-by-step explanation:
The nurse should include the following instruction: "This medication will provide long-term control of your asthma symptoms." Salmeterol is an inhaled, long-acting beta-2 adrenergic agonist that is used to treat severe persistent asthma. It is prescribed for daily use and helps decrease the number and severity of asthma attacks in conjunction with a glucocorticoid medication which provides an anti-inflammatory effect. Importantly, it should not be used for acute asthma attacks and should not be discontinued once symptoms improve, as it is used for long-term control. Contrary to one of the options provided, Salmeterol is not an anti-inflammatory medication; rather, it promotes bronchodilation to ease breathing.