I can take up to 20 mg oxazepam PRN for anxiety, panic or restlessness, and 1 mg lorazepam as a 'knock-out drug'. If I'm doing really badly in the evening, I'll take lorazepam and go to bed - even if it is 18.30 or 19.00.

(Pdoc told me I'm allowed to take another mg of lorazepam if the first doesn't knock me out and the need is great)