<prompt> All are used in painful diabetic neuropathy, except-PhenytoinLocal use of capsicumDextroamphetamineAmitriptyline  <response>: Chronic, painful diabetic neuropathy is difficult to treat but may respond to the following: Intensive insulin therapy strict glycaemic control Anticonvulsants gabapentin, pregabalin, carbamazepine, phenytoin Other antidepressants duloxetine Tricyclic antidepressants amitriptyline, imipramine Substance P depleter capsaicin--topical Opiates tramadol, oxycodone Membrane stabilisers mexiletine, intravenous lidocaine Antioxidant alpha-lipoic acid Reference : page 833 Davidsons Principles and practice of Medicine 22nd edition 