Objective To examine the awareness, prevalence of use, and knowledge of risks of pepper injection (PI), an injection of highly concentrated oxytocin used to augment or induce labor, among clinicians. Methods An anonymous pre‐ and post‐workshop evaluation conducted among 227 clinicians participating in emergency obstetric and newborn care training in Sierra Leone from June to October 2018. Results Overall, 225 participants completed the surveys. Of these, 198 (88.0%) of clinicians reported awareness of PI, and 123 (54.7%) self‐reported prior use, which was highest among midwives (94/129; 72.9%). Before EmONC training, 82 (36.4%) clinicians reported that they were likely to use PI; this decreased to 39 (17.3%) after training (P<0.05). The mean number of participants correctly identifying risks of PI increased from 149 (66.2%) to 204 (90.7%) after training (P<0.05). Conclusion There was widespread awareness of PI use among clinicians, and prevalent self‐reported prior use among midwives. Risk awareness improved after EmONC training, and the proportion of clinicians reporting likelihood of future use decreased. Improper use of oxytocin may be a major contributor to maternal and newborn morbidity and mortality in Sierra Leone. Initiatives to educate clinicians and to regulate and stop the practice are needed. Synopsis Most midwives undergoing an obstetric training program in Sierra Leone reported prior use of pepper injection—namely, highly concentrated oxytocin—for labor augmentation or induction.