What do systematic reviews say?

Intramuscular corticosteroids vs oral corticosteroid

Intramuscular corticosteroids showed no clear difference in relapse 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 0.94 [0.72, 1.24]
  9 studies · 804 participants
  Low
• Intramuscular versus oral corticosteroids to reduce relapses following discharge from the emergency department for… 2018 · Cochrane Headline outcomes only
  RR 0.74 [0.51, 1.07]
  7 studies · 742 participants
  Moderate
• Intramuscular versus oral corticosteroids to reduce relapses following discharge from the emergency department for… 2018 · Cochrane Headline outcomes only
  RR 0.99 [0.74, 1.33]
  5 studies · 556 participants
  Low