This study aims to compare quality of perioperative analgesia of lidocaine and remifentanil intravenously in surgical interventions for the treatment of breast cancer.
Inclusion Criteria: * Female patients scheduled for elective surgery performed mastectomy; * Physical Status P1 and P2 of the American Society of Anesthesiology (ASA); Exclusion Criteria: * Patients with less than 18 years and above 75 years of age; * Patients who are allergic to morphine and / or lidocaine; * Patients with chronic pain; * Patients with severe hepatic disease; * Patients with severe renal disease; * Patients with neurological disorders; * Patients included in other clinical currently or within the past three months under general anesthesia studies; * Patients who refuse to participate in the study; * Any other condition that in the opinion of the investigator, may pose a risk to the patient or interfere with the study objectives;