Hi. My LO gets his LiO at bedtime, so his blood draw (that yielded the <.3 results) was done more than 12 hours after dosage----who knows if that's significant. The earlier draw (when it was <.1 and he was getting 5mg versus 20) was done with the same timing.
He continues to decline; it's impossible to know how much he would have declined, absent the lithium. But I see no adverse effects whatsoever. So despite it not being a "fix", we'll continue to do it.