Dr neurologist had prescribed dothip25 , Gabapentin nt. for nerve pain. Took these med for 2 year's. Since then have developed severe constipation.or ODS. recently had undergone colonscopy, reports are normal. Dr has provided all the necessary treatment but still problem presists. He said can't help further. there are medicine, treatment options available. & also need to ask how much time is needed, required to do complete colonscopy test via anesthesia. Thank you.