Nervous system disorders Very rare (< 1/ 10,000) Paresthesia, paralysis (Bell's palsy), peripheral neuropathies (polyradiculoneuritis, facial paralysis), neuritis (including Guillain Barre Syndrome, optical neuritis, myelitis including transverse myelitis), encephalitis, demyelinating disease of the central nervous system, exacerbation of multiple sclerosis, multiple sclerosis, seizure, headache, dizziness, syncope