My wife is 76 years old, I am 65. She does not recognise night from day ,and so for the last week she has been getting up for breakfast at about midnight. She has smoked for 60 years and has the obsession of flicking the lighter for no apparent reason. She does not recognise which end of the cigarette to light, and subsequently I have to get up and monitor the situation all night which is very wearing. She sleeps during the day, and I have been advised to try and sleep when she sleeps. Today she has lit tissues and caught the tea towel alight. She has recently (last 3 days) been taking Memantine HydroChloride 5mg and later stepped up, and her condition appears to be getting worse each day. Any thoughts, she is addicted to cigarettes and any ban would lead to major difficulties.