Effect of Intravenous High Dose Vitamin C on Postoperative Pain and Morphine Use after Laparoscopic Colectomy: A Randomized Controlled Trial

Younghoon Jeon, Jun Seok Park, Suyoung Moon, Jinseok Yeo, Younghoon Jeon, Jun Seok Park, Suyoung Moon, Jinseok Yeo

Abstract

Background and Objective. Vitamin C has antioxidant, neuroprotective, and neuromodulating effects. Recently, it showed antinociceptive effect as a result of the antioxidant properties. Therefore, we designed this study to assess the effect of intravenous vitamin C on opiate consumption and pain in patients undergoing laparoscopic colectomy. Methods. A total of 100 patients were enrolled and allocated to receive 50 mg/kg vitamin C or placebo by intravenous infusion immediately after induction of anesthesia. Morphine consumption and scores of pain were assessed at 2, 6, and 24 h after completion of surgery. Results. There were 97 patients included in the analysis. Patients who received vitamin C had higher plasma concentrations of vitamin C at the end of surgery, significantly lower morphine consumption at the 2 h after end of surgery, and significantly lower pain scores at rest during first 24 h postoperatively. There was no significant difference between groups in side effects, fatigue score, or pain score during cough. Conclusion. This study shows high dose vitamin C infusion decreased postoperative pain during the first 24 h and reduced morphine consumption in the early postoperative period. Additional research needed to examine whether higher doses of vitamin C and longer infusion times can amplify these effects.

Figures

Figure 1
Figure 1
Flow chart describing recruitment, allocation, follow-up, and analysis. NRS, numeric rating scale.
Figure 2
Figure 2
Pain scores at rest (a) and during coughing (b) by numeric rating scale at 2, 6, and 24 h after surgery (mean ± standard deviation). P < 0.05.
Figure 3
Figure 3
Postoperative morphine consumption (a) at 2, 6, and 24 h after surgery and numeric rating scores of fatigue (b) before surgery and at 2, 6, and 24 h after surgery. Data are shown as means ± standard deviation. P < 0.05.

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Source: PubMed

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