"All other things being equal, I expect to meet most current and, as far as possible, future commitments but will discuss things with the various organisers," he said.
"Frankly, I would prefer it if people kept things cheerful, because I think there's time for at least a few more books yet."
He told fans the statement should be interpreted as "I am not dead".
"I will, of course, be dead at some future point, as will everybody else," he said.
"For me, this may be further off than you think. It's too soon to tell.
"I know it's a very human thing to say 'is there anything I can do', but in this case I would only entertain offers from very high-end experts in brain chemistry."
Good luck Terry
