For Post Herpetic Neuropathic Pain Lyrica (Pregabalin) Initial, 75 mg orally two times a day OR 50 mg orally three times a day; may be increased to 300 mg/day within 1 week based on efficacy and tolerability Maintenance, 75 to 150 mg orally two times a day OR 50 to 100 mg orally three times a day (150 to 300 mg/day) Neurontin (Gabapentin ) 300 mg orally on day 1, 300 mg twice a day on day 2, and 300 mg 3 times a day on day 3; may increase up to 1800 mg/day (divided into 3 doses) Both are prescription drugs. China shall have imported brand name drugs or domestic generic drugs.