Which of the following statements concerning the safety of medications used by older patients is wrong?
1) Chlorpropamide can cause hypoglycemia
2) Benzodiazepines have large volume of distribution and are thus relatively safe for use in older people
3) Amantadine excretion depends on renal function and may cause confusion and falls if the dose is not adjusted for renal impairment
4) Diphenhydramine may exacerbate urinary retention of older men
5) Meperidine is not an effective oral analgesic in dosages commonly used and may cause naurotoxicity