What do systematic reviews say?

Intervention not reported

The intervention showed no clear difference in serious adverse events 49 weeks (low certainty).

• Long‐acting muscarinic antagonists (LAMA) added to combination long‐acting beta₂‐agonists and inhaled corticosteroids… 2016 · Cochrane Headline outcomes only
  OR 0.6 [0.24, 1.47]
  3 studies · 1197 participants
  Low