Placebo injections actually improve lateral epicondylitis at high rates. No other injections convincingly improve it better than placebo.Corticosteroid injection is not superior to saline or anesthetic injection (strength of recommendation [SOR] A, systematic review of randomized controlled trials [RCTs]). Platelet-rich plasma (PRP) injection is not superior to saline injection (SOR A, meta-analysis of RCTs).Botulinum toxin injection, compared to saline injection, modestly improved pain in lateral epicondylitis, but with short-term grip-strength weakness (SOR A, meta-analysis of RCTs). Prolotherapy injection, compared to saline injection, improved pain at 16-week, but not at 8-week, follow-up (SOR B, one small pilot RCT).Hyaluronic acid injection, compared to saline injection, resulted in a statistically significant pain reduction (6%) but did not achieve the minimum clinically important difference (SOR B, single RCT).Autologous blood injection, compared to saline injection, did not improve disability ratings (SOR B, one small RCT).