peripheral neuropathy
"Effectiveness of the drug for neuropathy in hands and feet was negated by side effects, including:  Severe 24/7 headaches;   wild crazy dreams that woke me up at night.  The pharmacist said these symptoms usually went away after 2 weeks, but after 2 months they persisted, and other side effects seemed to be increasing.  I had taken Neurontin in the past, and Lyrica, with no problems whatsoever.  
When researching side effects, was very surprised to read that these side effects where specific to the generic formulation.  Went off, and all the side effects slowly subsided, taking about 2+ weeks to completely end."