<p>The adverse reaction profile for Bupivacaine is similar to those for other long acting local anesthetics administered intrathecally. Adverse reactions caused by the drug are difficult to distinguish from the physiological effects of the nerve block (e.g. decrease in blood pressure, bradycardia, temporary urinary retention), events caused directly (e.g. nerve trauma) or indirectly (e.g. epidural abscess) by the needle puncture or events associated to cerebrospinal leakage (eg. postdural puncture headache).</p>