They are very important, especially if he's taking lithium. That's one of the ways they can tell if the meds need to be adjusted. Mine doesn't like going, either, but he's learned that it's better when he does. Especially when he's been having trouble with noises in his head. It gives him some peace of mind.
Yep, lithium levels NEED to be checked. They can either not be enough to be therapeutic or they can be too much and can become toxic. Other meds require other testing like for liver enzymes, etc. I agree with Sally that letting him know that it's a small thing to give a LOT of peace of mind.
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