Been recently been diagnosed with Fibromyalgia. Currently taking 60mg of duloxetine, co codamol 15 500 (8 tablets a day) and 1800mg of gabapentin daily. I initially started on 300mg of Gabapentin daily and just recently increased to the new amount. Been taking the medication for about 6 weeks now and was wondering if I should have seen some signs of relief now. How long before gabapentin kicks in for Fibromyalgia pain?