I m Type 2 Diabetic, Hodgkins Lymphoma survivor after stem cell procedure in 2008. Recently started experiencing severe swelling in feet, ankles and legs and 20 lb weight gain over 6 months. Exercise has declined due to foot pain (neuropathy ). I take metformin, amlodipine, insulin, simvastatin,amitriptyline and quinapril . Could any of these medications be causing the edema or weight gain, or can the combinations not be interacting properly ?