I can second that GibbledyG, I also had an immediate worsening of walking, an increase in spasticity and shakiness.
I gave up 5 years ago and I am so happy that I did. I have met others with MS who say that MS is so stressful sure they've nothing much left in their lives that gives them pleasure but smoke. That's just nicotine addiction.
I only realised how insidious the nicotine addiction is when I gave up - I was thinking things like "I'll never enjoy another meal out without cigarettes" "never enjoy a beautiful bit of scenery" "never be able to cope when upset"....all a load of BS. Just nicotine addiction. If you've out there with MS and a smoker, and are dithering about giving up....do it. It will be the best present you'll ever give yourself.
RR-MS dx 1998 and Coeliac dx 2003
Copaxone, Cymbalta. EPO, Fish Oils, Vitamin D3 2000 IU daily, Cal/Mag/Zinc, Multivitamin/mineral, Co-Enzyme Q10, Probiotics, Milk Thistle.