This is a clinical practice guideline for patients with stage IV non-small-cell lung cancer. The guideline reviews systemic therapies as first-, second-, and third-line treatment options, with considerations made to patient performance status and tumour characteristics such as EGFR/ALK status. The guideline provides recommendations on therapy type and dosage as well as interval and duration. Topics of interest include treatment considerations for older adults (65 years or older) and a discussion on palliative care. Outcomes of interest include survival (overall, progression-free), and adverse events.