Can you try getting his dose upped a bit and splitting it 3 ways so that he’s covered more during the day?
We found that when the dose was right, the improvement was starting after a few days, and then by 2 weeks things were much better. If the dose wasn’t right, too low or meds weren’t being given properly, then things started to get a bit better, but never really much better and then just went downhill again.
Not sure what his marci-kids dose is, but I’m sure there’s room to move. Also, you’re giving it on an empty stomach and following up with a meal 30 minutes later, right?