thanks... i have been taking metaprolol for yrs now, a month ago i ran out of my isordil 20 mg, 3xday, and the metaprolol was 100 mg 2x per day. took last pill yesterday morning annd now i have a headache that is excruciating. all i have for bp is 10 mg lisinopril, to take once daily....i took 2 to cee if tht wld help. can u plz tell me if this is a dangerous state to b in??