What happens if you stop Effexor cold turkey?

I wanted to share this information quoted directly that I found at the following website:

http://www.nwmhft.nhs.UK/Pharmacy/mood1.htm

"Can I stop taking lithium suddenly?"

"Absolutely not! It is very unwise and risky to stop taking lithium suddenly, even if you feel better. Recent studies have shown that if you are taking lithium for Bipolar disorder and stop it suddenly (ie over 1 to 14 days) you have a 1 in 2 (50%) chance of becoming ill again within six months and a 90% chance of becoming ill again within 3 years. If you need to stop lithium, it should be gradually over at least four weeks, preferably longer i.e. 3-6 months The dose should be decreased graduallyduring this time to minimise possible problems. You've got a lot to lose if you stop lithium too quickly."

My interpretation: It does not name what the exact physical effects are, (I suppose they may be different in each individual person), but a chance of relapse seems likely.