BACKGROUND The search for the ideal analgesia following caesarean section is still ongoing. Administration of opioids remains the gold standard for post‑ operative analgesia. The parenteral form of opioid has been in use for quite some time. It is used by many health facilities including ours in the management of post caesarean section pain. Intramuscular opioid induces pain and is more demanding on the nursing staff. Oral opioid is yet to be studied in the management of post caesarean pain in our environment. Oral morphine has become increasingly accessible in our environment and it is hypothesized that it may be more effective than the conventional parenteral opioids for post-caesarean analgesia. OBJECTIVE To compare the efficacy of multiple doses of oral morphine 10mg with that of intramuscular pethidine 50mg in the treatment of post caesarean pain among parturients at FMC Abeokuta, Nigeria. RESEARCH METHODS The study was a randomized controlled trial carried out among parturients that had elective caesarean section at the Federal Medical Centre, Abeokuta between November 2019 and August 2020. A total of 136 consenting eligible pregnant women scheduled for caesarean section were randomized into the two groups. Group A received multiple doses of oral morphine 10mg; group B received multiple doses of intramuscular pethidine 50mg. The Summed Pain Intensity Difference of the two groups was calculated and compared using the chi-square at the present level of significance of < 0.05 (P value)