Table 1.

Characteristics of RCTs evaluating preoperative gabapentin use on postoperative opioid consumption

Author (year)	Type of surgery	Number of subjects (gabapentin/control)	Dose (mg)	Control	Type of opioid
Pandey et al (2004)34	Cholecystectomy	153/153	300	Placebo	Fentanyl
Pandey et al (2004)23	Orthopedic surgery	28/28	300	Placebo	Fentanyl
Turan et al (2004)35	Abdominal hysterectomy	25/25	1,200	Placebo	Tramadol
Turan et al (2004)36	Orthopedic surgery	25/25	1,200	Placebo	Morphine
Radhakrishnan et al (2005)37	Abdominal hysterectomy	30/30	800	Placebo	Morphine
Adam et al (2005)38	Orthopedic surgery	30/30	1,200	Placebo	Morphine
Al-Mujadi et al (2006)39	Thyroid surgery	37/35	1,200	Placebo	Morphine
Pandey et al (2006)40	Cholecystectomy	125/125	600	Placebo	Fentanyl
Montazeri et al (2007)41	Orthopedic surgery	35/35	300	Placebo	Morphine
Grover et al (2009)42	Total mastectomy	25/21	600	Placebo	Morphine
Srivastava et al (2010)43	Cholecystectomy	60/60	600	Placebo	Tramadol
Moore et al (2011)22	Cesarean section	21/23	900	Placebo	Morphine
Deniz et al (2012)44	Prostatectomy	25/26	900	Placebo	Tramadol
Short et al (2012)45	Cesarean section	42/42	300	Placebo	Morphine
Short et al (2012)45	Cesarean section	42/42	600	Placebo	Morphine
Kinney et al (2012)21	Thoracotomy	57/63	600	Placebo	Morphine
Bharti et al (2013)20	Mastectomy	20/20	600	Placebo	Morphine

Abbreviation: RCT, randomized control trial.