My husband has been taking 2 capsules of Centrum Multivitamin daily for 5 days now and he noticed 2 days ago that he's been lethargic most times, with increased urine output (color of urine very dark) though he has no problems passing urine. He's also experiencing lower back pains, nausea and vomiting (especially after intake of food). as he is currently working abroad, I am not fully convinced that he went to see his doktor about it. Could you please enlighten me about the side effects of Centrum Multivitamins and what damage it can do to the body if taken too much? thank you in advance