Patients with a history of uncontrolled seizure disorder; including focal or generalized seizure may not have had a seizure within one year prior to registration Seizure disorders requiring anticonvulsant therapy. Documented history of or current brain metastases due to seizure risk Contraindication to the use of bupropion including seizure disorder or conditions that increase the risk of seizure (including bulimia and/or anorexia nervosa, central nervous system [CNS] tumor, severe stroke, abrupt withdrawal from benzodiazepines or alcohol) Known brain metastases or history of seizure Patients with active seizure or history of seizure are not eligible Have a history of a seizure Seizure disorders requiring anticonvulsant therapy. Past or current history of epilepsy or seizure disorder; exception: well-documented febrile seizure of childhood Known central nervous system (CNS) metastases or seizure disorder; patients with known brain metastases that have been successfully treated and stable for >= 6 months without requirement for corticosteroids and without seizure activity will be eligible Inadequate seizure control Patients with active seizure or a history of seizure are not eligible Patients must NOT have active seizure(s) or history of seizure(s) PHASE II: Patients must NOT have active seizure(s) or history of seizure(s) Patients with a history of seizure disorder requiring antiepileptics who have had a seizure episode within the last 6 months Patients with history of seizure disorder requiring antiepileptics who have had a seizure episode within the last 6 months For Cohort C: Has a history of seizure or any condition that may predispose to seizure Patients must not have active seizure or history of seizure Subject has a history of seizure or any condition that may predispose to seizure. History of seizure or any condition that may predispose to seizure; A history of seizure within 12 months prior to study entry. Has a history of seizure History of seizure or any condition or concurrent medication that may predispose to seizure Concurrent therapy with medications known to have seizure potential History of seizure or any condition or concurrent medication that may predispose to seizure past history of seizure due to any cause except a single febrile seizure in childhood. Patients with a history of seizures should not have had a seizure within 12 months of Screening and must have had no anticonvulsants for 12 months prior to Screening, Subject has a history of seizure within the past 12 months of Screening as assessed by neurology examination and history. History of seizure or condition that may pre-dispose to seizure Any history of seizure or condition that may predispose to seizure Patients with uncontrolled seizure disorders No uncontrolled seizure disorders Patients must not have a history of any type of seizure for at least 10 years prior to registration. Concurrent treatment with medications known to have seizure potential History of seizure or condition that may predispose to seizure Patients must not have uncontrolled central nervous system disease; patients with a history of seizure disorders must be seizure-free for one year prior to enrollment Known brain metastases, uncontrolled seizure disorders, encephalitis, or multiple sclerosis History of seizure or any condition that may predispose to seizure. Seizure disorders requiring anticonvulsant therapy History of seizure disorders Any history of brain metastases or prior seizure or conditions predisposing to seizure activity Focal or generalized seizure within the last 12 months. Uncontrolled seizure activity. History of seizure Prior seizures < 3 months prior to enrollment. Subjects with a history of seizure disorders ? 3 months prior to enrollment must be seizure free and on stable anticonvulsant medication(s) for ? 3 months prior to enrollment). Subjects with uncontrolled seizure Seizure disorders History of a seizure disorder diagnosis or have experienced a seizure in the past 12 months PATIENTS: History of neuroleptic malignant syndrome or active seizure disorder (with seizure episode within the past week) Patient has an active seizure disorder; (patients with a previous history of seizure disorders will be eligible for the study, if they have had no evidence of seizure activity, and they have been free of anti-seizure medication for the previous 5 years) Survivors who report ever being diagnosed with a seizure disorder or have experienced a seizure in the past 12 months will be excluded Patients who have a history of head injury or who have known seizure activity Patients with seizure disorders treated with anticonvulsants Patients who have a history of head injury or who have known seizure activity. Any history of brain metastases or prior seizure or conditions predisposing to seizure activity Documentation of history of seizure within previous 5 years Patients with prior seizure history who have experienced a seizure within the three months prior to enrollment are excluded Patients receiving glucocorticoids and/or anti-seizure medications are eligible for this study Patients with a seizure history will not be permitted on protocol; patients on anticonvulsant medications will not be permitted on study