Final answer:
The medication group that might be added to Mr. B's COPD treatment for additional symptomatic relief is inhaled corticosteroids.
Step-by-step explanation:
The medication groups most commonly used to treat COPD are bronchodilators and inhaled corticosteroids. In Mr. B's case, he has already been prescribed a long-acting B2-agonist and a long-acting inhaled anticholinergic agent for his COPD symptoms. If he needs additional symptomatic relief, the next drug group that might be added to his treatment is inhaled corticosteroids. Inhaled corticosteroids, such as fluticasone and budesonide, are anti-inflammatory medications that help reduce airway swelling and mucus production, providing further relief for COPD symptoms.