Yes you can take both CARDURA and TENORMIN in night together.There are two reasons for it
1.. CARDURA is an alpha blocker
and can cause low blood pressure and so it may result in lightheadedness
and sometimes a little off balance.So if you take it in night then you may not suffer fom this problem,however make sure to get up from your bed slowly to avoid postural hypotension
2.. Blood pressure medicines should always be taken in night as there is increased sympthmimetic activity in morning time,which can result in higher blood pressure and more chances of heart attack
in morning time.If you take it in night,you can be spared of morning rise of blood pressure and much less chances of heart attacks.