Dec 7, - Xanax is a drug that is used to treat anxiety and panic disorders. in the benzodiazepine family, the same family that includes diazepam (Valium), Benzodiazepines act on the brain and central nervous system to produce a calming effect. The sedative effects of Xanax may last longer in older adults. Last reviewed on RxList 03/14/ Serious side effects of Lamictal you should report to your doctor include: followed by a red or purple skin rash that spreads (especially in the face or upper body) .. Neurontin · Peganone · Rufinamide · Tegretol · Topamax · Tridione · Trileptal · Valium · Vraylar From WebMD Logo. Read more about the prescription drug GABAPENTIN - ORAL. It is also used to relieve nerve pain following shingles (a painful rash due to herpes of treatment, your doctor may gradually increase your dose so your body can . From WebMD Logo MISSED DOSE: If you miss a dose, take it as soon as you remember.