My husband is 54 and was diagnosed with mild Alzheimer's last November and is now taking 10mg of Donepezil, over the last few weeks I've noticed he's become more argumentative and short tempered and I'm not sure if this is due to the Donepezil. A couple of times this week whilst he's been out on his own he's argued with strangers, the first time he was out walking the dog, another dog was off lead and my husband had an argument with the owner and told him he should have his dog under control and to keep his dog away from ours. Today whilst he was out he had another argument with a man because he'd parked on the pavement at the end of our road. I know the points he's bringing up are valid and he isn't violent but when we argue he can be really nasty verbally and I'm just worried that he's going to say the wrong thing to the wrong person and things might turn nasty. I don't know what to do, I can't stop him going out and I work so I can't be with him 24/7. Any suggestions or reassurance would be welcome.