Convulsive seizures & peripheral neuropathy; numbness or paresthesia of an extremity; dizziness, vertigo, incoordination, ataxia, confusion, irritability, depression, weakness, headache, tinnitus, hearing loss, insomnia; nervousness, malaise or syncope; nausea, headache, anorexia, dry mouth & sharp, unpleasant metallic taste, vomiting, abdominal discomfort, diarrhea, epigastric distress & constipation; reversible neutropenia (leukopenia); flattening of T-wave; urticaria, pruritus, maculopapular rash, erythematous rash, flushing, nasal congestion, dryness of mouth (or vag or vulva), fever & fleeting joint pains; dysuria, cystitis, polyuria, incontinence, sense of pelvic pressure; urethral burning or discomfort, dryness of the vag, proliferation of vag candida, dyspareunia, decreased libido, proctitis; genital pruritus, dysmenorrhea, UTI; darkened urine; upper resp tract infections, rhinitis, sinusitis & pharyngitis; thrombophlebitis.