What do systematic reviews say?

Summary of findings table ‐ Topical small molecule inhibitors (ruxolitinib) vs placebo

It is very uncertain whether summary of findings table ‐ Topical small molecule inhibitors… changes incidence of serious adverse events compared with placebo (very low certainty).

• Treatments for alopecia areata: a network meta‐analysis 2023 · Cochrane Headline outcomes only
  RR 0.33 [0.01, 7.94]
  1 study · 78 participants
  Very low