Mr. I took intunive. We had the same reaction. Way tired in the afternoon. Intunive is a blood pressure medication. We had Mr. I. checked at our DR. office for drop in blood pressure every day for 2 weeks (When we went to 2 mg). It turned out Mr. I. couldn't take intunive at this dose because of a pressure drop, But This is unusual. Even at the 1 mg. dose we had to give it at night. This is one of those medications where timing is everything.
Ask the Dr. for a script for a digital BiPolar (BP) cuff. Maybe your insurance will cover it. Then you can reassure yourself that he is OK. I know how you feel about being uneasy with the sleepiness. I was too.
Stay strong and don't give up. The dr. will help with your concerns.
Garrison