Comparison between Tramadol and Butorphanol for Treating Postoperative Catheter-Related Bladder Discomfort: A Randomized Controlled Trial

<div>Adverse effects in the two groups (presented as numbers).</div>

Evidence-Based Complementary and Alternative Medicine

Figure 3: Comparison between Tramadol and Butorphanol for Treating Postoperative Catheter-Related Bladder Discomfort: A Randomized Controlled Trial 