Pharmaceutical compositions and preparations for the treatment of neuropathic pain, neurodegenerative diseases, neurological conditions, and degenerative brain diseases; Pharmaceutical compositions and preparations for the treatment of amyotrophic lateral sclerosis (ALS), Parkinson's disease, multiple sclerosis (MS), Huntington’s disease (HD), Friedreich's ataxia (FA), Alzheimer's disease, motor neuron disease, cognitive disorders, memory impairment, and memory deficit.