What do systematic reviews say?

Summary of findings table ‐ Oral classical immunosuppressants (prednisolone or cyclosporine) vs placebo

It is very uncertain whether summary of findings table ‐ Oral classical immunosuppressants… changes short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of compared with placebo (very low certainty).

• Treatments for alopecia areata: a network meta‐analysis 2023 · Cochrane Headline outcomes only
  RR 4.68 [0.57, 38.27]
  2 studies · 79 participants
  Very low