Should the elderly take multivitamins?

A pharmacist was performing a Home Medicines Review for an 80-year-old woman, who lived alone. The lady had a past medical history of ischaemic heart disease, hypertension, and rheumatoid arthritis. Her prescribed medications were as follows: aspirin 100mg mane, diltiazem SR 180mg mane, indapamide SR 1.5mg mane, rofecoxib 25mg mane, paracetamol prn, isosorbide mononitrate 60mg each morning, and a glyceryl trinitrate spray for use when required. She was thin and her weight was noted to be only 42kg. Upon questioning, it appeared that her nutritional intake might be less than ideal. In addition, she had a low dietary intake of calcium and was essentially housebound. Among other suggestions, the pharmacist indicated that the patient could benefit from a multivitamin preparation and 1000 IU of vitamin D (ergocalciferol} daily. Does this seem a reasonable suggestion?