Which is the most common symptom of lung cancer?

A. Formoterol is a long-acting beta agonist (LABA) used for maintenance therapy, not for aborting acute asthma attacks. LABAs help prevent asthma symptoms but are not effective for immediate relief during an acute attack.
B. Albuterol is a short-acting beta agonist (SABA), which is the medication of choice for relieving acute asthma symptoms. It acts quickly to relax the muscles of the airways and relieve bronchospasm.
C. Beclomethasone is an inhaled corticosteroid used for long-term asthma control, reducing inflammation, but it is not used to treat acute attacks.
D. Salmeterol is another LABA, similar to formoterol, and is not used for aborting acute asthma attacks but rather for long-term control.

A. Fatigue: While fatigue can occur in lung cancer patients, it is not the most common symptom. Fatigue is more of a generalized symptom that can be seen in many diseases, not specific to lung cancer.
B. Hoarseness: Hoarseness can be a symptom of lung cancer, particularly if a tumor is affecting the laryngeal nerves. However, it is less common than a persistent cough and is not usually the initial symptom.
C. Anorexia: Anorexia (loss of appetite) can occur in patients with advanced cancer, including lung cancer, but it is not the most common presenting symptom. Weight loss due to anorexia is more common in later stages.
D. Persistent cough: This is the correct answer. A persistent cough is the most common symptom of lung cancer, especially in the early stages. The cough may be dry or productive and is often overlooked or mistaken for a chronic respiratory condition. It is frequently one of the first signs that leads to further investigation and diagnosis.