 [ Symptoms ] i was on atenolol 50 bid for hypertension insurance changed to 100 once a day should i take this in the a m or p m  hello i have been on 50 mg bid of atenolol for years for hypertension but my insurance recently changed it to 100 mg once a day when is the best time to take this morning or evening thank you [ Disease ] i think you should call your health care provider is office about this your insurance company cannot change your prescription dosing only a licensed medical professional can do that please call your doctor or pharmacist right away to clarify the instructions for taking this medication if the atenolol is provided as a tablet it is possible you may be able to split the tablet and continue to take one 50 mg dose twice a day but i do not want you to do that without guidance from your pharmacist or health care provider hope this helps