What do systematic reviews say?

Mometasone/formoterol (MF/F) vs placebo

Mometasone/formoterol (MF/F) showed no clear difference in adverse event—any—400/103 Duration of six months compared with placebo (low certainty).

• Combined corticosteroid and long‐acting beta₂‐agonist in one inhaler versus placebo for chronic obstructive pulmonary… 2013 · Cochrane Headline outcomes only
  OR 0.98 [0.75, 1.3]
  890 participants
  Low