Bronchodilator Reversibility in Asthma

A 28-year-old woman with a 2-year history of episodic wheeze and dyspnea presents to the pulmonology clinic. Baseline spirometry shows FEV1 of 68% predicted with FEV1/FVC ratio of 0.62. She is asked to withhold her salbutamol inhaler for 6 hours, and then post-bronchodilator spirometry is performed 15 minutes after inhalation of 400 µg salbutamol via spacer. The post-bronchodilator FEV1 improves to 82% predicted, representing an absolute increase of 240 mL. The spirometric pattern marked **A** in the diagram (post-bronchodilator FEV1 improvement of ≥12% AND ≥200 mL) is demonstrated in this patient. Which of the following is the most appropriate next step in management according to GINA 2024 guidelines?