I was doing reasonably well, and stable for a couple of weeks after we got my lithium levels to around 0.7 mmol/l on 750mg of Camcolit. Then I changed brands to Quilonum, and my pdoc prescribed 1 tablet daily, thinking it was a 900mg dose, when in fact it was a 450mg dose that should have been taken twice daily.
I was also prescribed Concerta 54 for ADHD, and responded to that with instant excitability and distress, followed by a crashing depression. (Stopped Concerta immediately).
But for the following 2 weeks I have been suicidal with increasing confusion and feelings that the world was conspiring against me.
When I found out last night that I had been put on a wrong dose of lithium, I had my proof that the enemy had indeed infiltrated one of my most trusted allies - my pdoc.

That wasn't complete cold turkey, but the effect of the dosage change seems to be quite radical.