My doctor has prescribed Neurontin 100mg at bedtime for chronic headaches and facial pain; she is not sure if the pain I am suffering is because of my fibromyalgia but she thought this medicine would be worth trying. I am very sensitive to medicines and I'm afraid to try it. I take 75 mg of Effexor in the morning, but my doctor said the two meds won't bother each other. Any advice would be appreciated, thanks.