The invention relates to the compounds of formula I or its pharmaceutical acceptable salts, as well as polymorphs, solvates, enantiomers, stereoisomers and hydrates thereof. The pharmaceutical compositions comprising an effective amount of compounds of formula I, and methods for the treatment of neurologic diseases may be formulated for oral, buccal, rectal, topical, transdermal, transmucosal, intravenous, parenteral administration, syrup, or injection. Such compositions may be used to treatment of epilepsy, migraine, neuropathic pain, post herpetic neuralgia, pain, Creutzfeld-Jakob disease, Alzheimer's disease, multiple sclerosis, Batten disease, multiple sclerosis, Parkinson's disease (PD), restless legs syndrome (RLS), cluster headache, depression, fibromyalgia, sexual dysfunction, amyotrophic lateral sclerosis (ALS), Alzheimer's disease, autism, bipolar disorder and anxiety disorder, trigeminal neuralgia, attention-deficit hyperactivity disorder, schizophrenia, neuropathic pain, seizures, bipolar disorder and mania.
