Does anyone know what the maximum dosage in a single pill Tylenol can be purchased in is?

I could have sworn that a few months back i bought some 800/850mg Tylenols but it seems that all the stores in our area right now only have 650mg as the largest dosage painkiller.

Anyone happen to know for certain what the largest available dosage would be in something like Tylenol that you could just walk in to a Walgreens or CVS and buy is?

Regards,

Lee