Intramuscular corticosteroid injections in seasonal allergic rhinitis: A systematic review.
Ahmed Bayoumy BayoumyFelicia van SchieInge StegemanEsther B BlijlevenErwin L van der VeenJacob A de RuPublished in: Laryngoscope investigative otolaryngology (2021)
The outcome of this systematic review on trials concerning intramuscular steroid injections, despite being based on individual studies claiming favorable outcome with their use, is "inconclusive." This is because of the epidemiological high risk of bias in these studies that were mostly executed more than 30 years ago. The "inconclusive" rating allows for a description as an "optional therapy" for severe cases in guideline formation.