What kind of pain are you taking it for?
Maybe we can copy your question to the forum that covers your symptoms/condition.
From what i have read in general for chronic pain conditions -
some take a short term pain med {or for break thru pain} along with a long acting/sustained release med.
If your pain isn't managed then a call to the dr is needed, sounds like you need adjustments to your rx right now.
depending on what your pain is from {muscle, nerve, acute injury or ??}, some other modalities might be good to look into also.
If muscle based- Heating pad, Electrical stim {TENS or IF stim}, ultrasound, low level laser, massage, stretching...
If you can give more info it will help us with ideas for you.
PS- I just noticed your other posts
But you might call the dr and let him know your pain levels and ask about a short acting med to bridge the time until the Neurontin kicks in..