When a yellow zone meter reading appears on a peak flow meter for a client with asthma, what action should the nurse instruct the client to take?

When a yellow zone meter reading appears on a peak flow meter for a client with asthma, it indicates that the client's lung function is between 50% and 79% of their personal best. This range signifies that the client is experiencing some degree of airway obstruction and may need to take action to prevent further deterioration of their condition.

Taking prescribed relief medication is typically the appropriate response in this situation. These medications often include short-acting bronchodilators, which can help to quickly open the airways and alleviate symptoms of asthma. This proactive approach allows the client to manage their asthma and potentially avoid progressing to a more severe state that could require emergency intervention.

The other options are not suitable for a yellow zone reading. Seeking emergency care is more appropriate for a red zone reading, which indicates a severe reduction in lung function. Continuing normal activity could lead to worsening symptoms. Using a corticosteroid inhaler may be necessary for long-term control but is not the immediate response to a yellow zone reading, which calls for rapid relief measures.