Background: Known as suxamethonium or succinylcholine, is a medication used to cause short-term paralysis as part of general anesthesia. The duration of operation is one of the important factors accounting to the success of the operation. Simple safe available drug can change the plan of anesthesia.

Objective:  The purpose of this study was to assess adding Lidocaine three minutes intravenously before induction of general anesthesia on the duration of optimum prolongation the action of  Suxamethonium  . With other group with regular method.

Type of the study: a cross-sectional study 

 Methods: A 100 candidate to compare the effect of Lidocaine for unpremeditated patients ,American society of anesthesia( ASA)  physical status II .patients were scheduled for caesarian section surgery were randomly assigned to two groups: Group I patients received 1.5 mg/kg   Lidocaine 3 minutes before induction of general anesthesia, Group 2 patients received just the anesthetic agents.  For assessment of prolongation of action  the researcher Deepened on the clinical signs of recovery from Suxamethonium which are: spontaneous breathing, ability to swallow when we open the patient's lower jaw ( observing movement of the tongue ).between the two group Both groups received general anesthesia. 

Results:   The  of prolongation of Suxamethonium in elective cases in Group I was a about 7 - 15 minutes, while in Group II the time of Suxamethonium was about 3 - 5 minutes Conclusions :  The study concluded  that there was a significant difference  between the two groups from the side of suxamethonium time in group one( lidocaine group)as there was prolongation of time more than group two .