This drug increases the risk of infections, primarily viral but also bacterial, It does this by causing white cell suppression. It can also decrease platelets, which in extreme cases would result in bleeding. It can alter appetite and cause psychiatric symptoms. It can also cause sleepiness, convulsions and vertigo, high blood pressure,bronchitis and vomiting,jaundice,oedema and muscle and joint pains. Finally impotence and fatigue. I have left out the rarer problems so the list is not comprehensive. Hope this was useful. Gabapentin is used to help control certain types of seizures in patients who have epilepsy

Gabapentin is also used to relieve the pain of postherpetic neuralgia

Gabapentin may help to control your condition but will not cure it. Continue to take gabapentin even if you feel well. Do not stop taking gabapentin without talking to your doctor. If you suddenly stop taking gabapentin, you may experience withdrawal symptoms such as anxiety, difficulty falling asleep or staying asleep, nausea, pain, and sweating. If you are taking gabapentin to treat seizures and you suddenly stop taking the medication, you may experience seizures more often. Your doctor probably will decrease your dose gradually over at least a week

Gabapentin is also sometimes used to relieve the pain of diabetic neuropathy (numbness or tingling due to nerve damage in people who have diabetes), and to treat and prevent hot flashes (sudden strong feelings of heat and sweating) in women who are being treated for breast cancer or who have experienced menopause ( 'change of life', the end of monthly menstrual periods).