I was diagnosed with TN just a few days ago. I am currently on Prednisone, which will gradually be titrated down; as well, I am taking Lyrica 50 mg twice a day. Fortunately, I have been able to identify and avoid my triggers of hot and cold, and for the most part, my pain has been tolerable; occasionally, I have short, sharp pains in my face/jaw. I am concerned about side effects as I have been tired and dizzy since I started the Lyrica. I also want to avoid the weight gain and would like to have the occasional evening with a glass or so of wine. I would prefer not to be dependent on daily medications. So my question is, can I take Lyrica on a prn basis? Or, is it a drug that works only with regular use?