Lithium in the morning ?

Recently started Lithium about 3 weeks ago and I find that when I take it before bed or even with my supper, it has an activating effect on my brain.

I tried taking it in the morning but had some side effects and stopped because the pharmacist told me to but only after 3 days. So not a real test.

Has anyone noticed an activating effect in the evening ? Does anyone take it first thing in the morning ?