I don't know too much about medication - I have had Prozac myself in the past and was definately told that they had to be tapered off not just stopped suddenly.

Here's a post about a good helpline to phone.

Tablet advice line - useful!!!

Piglet x

"Supposing a tree fell down, Pooh, when we were underneath it?" said Piglet.
"Supposing it didn't," said Pooh after careful thought.