Doctor just started me on 50 mg vimpat today , 25 mg in the morning and 25 mg 12 hours later and wants me to take Metanx at night (18 pills to see how I react first) but it says it's a lot of B12 I thought that is a stimulant that will keep you awake, then he wants me to take cerefolin NAC after I'm done with the Metanx in the morning I'm so confused I called him twice and his staff told me the same but my Pharmacy said it can keep you awake any suggestions will help it says it's so helpful for neuropathy burning of the legs and tingling in the arms and feet thank you anyone out there please, Thank you, Brielle