A Cross-Sectional Pharmacoepidemiological Study of the Utilization Pattern of Pre-Anesthetic Medications in Major Surgical Procedures in a Tertiary Care Hospital.

OBJECTIVE : A study of the utilization pattern of pre-anesthetic medications in major surgical procedures.

MATERIAL AND METHODS : A cross-sectional, pharmacoepidemiological study was conducted among patients undergoing surgical procedures in routine or emergency conditions under general anesthesia. The utilization of pre-anesthetic medicines in all patients was reported.

RESULTS: A total of 110 patients (mean age - 42.36 years; 57.27% males) were enrolled. The major (>10%) indications for surgery were carcinoma/tumor - 25 (22.73%), perforation peritonitis - 20 (18.18%), and intestinal obstruction - 11 (10%). All patients received ranitidine plus metoclopramide. Injections of ondansetron, midazolam, pentazocin, anticholinergic agents, and fentanyl were used in 103 (93.64%), 103 (93.64%), 92 (83.64%), 84 (76.36%), and 23 (20.91%) patients, respectively. The dosage of ondansetron was 4 mg in 95 patients (86.36%), while 89.09% patients received 1 mg of midazolam. In 86 patients (78.18%), pentazocine was used in a 15 mg dose. Among the anticholinergic agents, glycopyrrolate was used in 76 patients (69.09%). Glycopyrrolate was used in a 0.2 mg dose in 74 patients (97.37%). The major indications for the use of fentanyl were carcinoma - 8 (34.8%), perforation peritonitis - 4 (17.4%), and surgery for intestinal obstruction - 3 (13%).

CONCLUSION: The administration of ondansetron, midazolam, and pentazocin is very common (>80% patients) as pre-anesthetic medication. Glycopyrrolate was the preferred anticholinergic agent. In cancer patients, the use of fentanyl is common.