Prophylaxis of Neuropathic Pain by mémantine

Inclusion Criteria: * 18 years old * patient suffering breast cancer with mastectomy/tumorectomy with or within cleaning 2 weeks after inclusion with or within pre-emptive chemotherapy Exclusion Criteria: * Against-indication at memantine administration : hypersensitivity at active substance or excipients, hypertension, antecedent cerebrovascular accident, severe cardiac insufficiency * Diabetic patient (Type I and II) * Patient with medical or surgical antecedents * Patient receiving treatment with amantadine, ketamine, dextrometorphan, L-Dopa, dopaminergic, anticholinergic agonists, barbiturate, neuroleptic, IMAO, antispastic agents, dantrolen or baclofen, phenitoin, cimetidine, ranitidine, procainamide, quinidine, quinine, nicotine, hydrochlorothiazide, warfarine * Patient with alcohol addiction * Woman in childbearing age not using effective contraceptive method, pregnant or lactating woman * Patient who participated in another clinical trial, located in exclusion period or received benefits \> 4500 euros during 12 months before the beginning of trial