Lance, I'm not understanding what you mean by "negative effects." If you mean the feeling of withdrawal, the answer is yes. Chances are you are not getting the same amount of nicotine that you would if you were smoking and especially not under the same conditions. Realize cigarettes contain more than 4000 chemicals. You can probably feel the effects of a few of them leaving your body. I used to wonder how long it takes for all of the chemicals to leave. Well, I don't know. However, you, just like me, have the rest of your life for them to do so. We've got however long it takes.
My Milage:
My Quit Date: 5/1/2009
Smoke-Free Days: 172
Cigarettes Not Smoked: 4,816
Amount Saved: $1,866.20
Life Gained:
Days: 18 Hrs: 20 Mins: 35 Seconds: 20