I had a real problem with wellbutrin, so not sure of the timing when it started having an effect....seemed like a continuous flow from the anorexia from the Prozac then immediately into the anorexia from the wellbutrin.....they must have not known the possible reactions 8 years ago....but then, I had a pdoc want to give me prozac for my weight loss the beginning of this year.....go figure.

Most of the time, my reactions hit within 24 hours....way before any effect could be discovered....so like most of the others...must takes several weeks to start working & several more weeks to really start working.

Good luck,
Debbie