Please read the article referred to in the starting post of this thread. The point is Neurontin is not effective for neuropathic pain and the data was suppressed and lies where told, millions earned. There may be a class action law suit to get our money refunded for drug cost and insurance's may also look for reimbursement. So don't risk those side effects for medications not proven to work for your disorder.
Placebo effects mean that the patient is not able to tell why they are feeling better but they do. we are highly suggestible creatures. There is no way to know if you are having a placebo response or a true response except in a clinical trial using dummy pills. If it works for you fine.
Most people taking sleeping pills before bed fall asleep before they can possibly be absorbed and effective. Placebo a very powerful effect.