What do systematic reviews say?

Intramuscular corticosteroids vs oral corticosteroid

Intramuscular corticosteroids showed no clear difference in 24‐hour beta agonist use compared with oral corticosteroids (low certainty).

• Intramuscular versus oral corticosteroids to reduce relapses following discharge from the emergency department for… 2018 · Cochrane Headline outcomes only
  RR 0.54 [0.21, 1.37]
  2 studies · 48 participants
  Low