I’ve just come across your thread regarding Concerta and wondered if you’d found out any more? I’ve been on Concerta XL 54mg per day for 5 years and recently noticed a significant tailing off in effect which is beginning to worry me.
In the past I have experienced “off days” where the meds don’t seem to have worked, but this never lasts for more than a day or two. What I’m experiencing now is different, like there is just no effect at all for days on end.
Would be good to hear if you found a solution!