Yes, from your post it reads like you have access to generic beta blockers, both atenolol and metoprolol are short term, last only a few hours. They are not slow release, one per 24 hours type of medication.
Talk with your prescribing doctor. But, I believe most who are taking regular/fast release beta blockers take them every 12 hours, I do.
Hi, please don't take medications on your own and without a proper schedule or prescription by your doctor. It can cause dangerous effects. Please consult a healthcare professional and get monitored for your blood pressure control. Regards.