Zero fatigue here and only mild diarrhea as a side effect. I combine 12mg Reta weekly with 2.25mg Cagri split across doses. Your Reta amount is still low; the three people I track needed 8mg or more before seeing good results.
I've got unused CagriSema stored away and am considering trying it ahead of a hectic period where stress eating is likely. The concern is avoiding extra tiredness. Reta gave me minimal issues but little effect on weight or hunger at 4mg. After a break, 3mg recently did almost nothing for curbing appetite. Opinions on whether to go with the CagriSema or raise the Reta amount? I regret not getting Tirz beforehand as it could have been ideal here.