Hi Jimmy,
The 240 a day is most likely to low to help much. I am on 480 and take two in the am and two in the pm but I usually have day time attacks. Many on here have mentioned that the rapid release is more effective than the extended. If you are on the ER you may want to talk to your doctor about swapping to RR as it seems like that may be more effective taken in the evening to keep the night attacks at bay.