Final answer:
Initially, blood pressure should be recorded every 2-3 minutes following an epidural block and after each reinjection until the patient's blood pressure is stable.
Step-by-step explanation:
After an epidural block, it is recommended to initially record blood pressure every 2-3 minutes after the block is begun and after each reinjection until stable. This practice helps in monitoring for potential hypotension, which is a known side effect of epidural anesthesia. Continuous and frequent blood pressure monitoring is crucial to ensure the safety and well-being of the patient under anesthesia.