Increased appetite, pancreatitis; petechia; increased SGOT, SGPT; confusion, incoordination; increased cough, pneumonia, epistaxis; deafness; rash, pruritus; otitis media; amenorrhea. Epilepsy: Complex partial seizure (CPS): Back pain, chest pain, malaise; tachycardia, HTN, palpitation; flatulence, hematemesis, eructation, periodontal abscess; myalgia, twitching, arthralgia, leg cramps, myasthenia; anxiety, abnormal gait, paresthesia, hypertonia, abnormal dreams, personality disorder; sinusitis; dry skin; taste perversion, abnormal vision; urinary incontinence, vaginitis, dysmenorrhea, urinary frequency. Other patient populations: Nausea, vomiting, indigestion, diarrhea, abdominal cramps, constipation & gingival disorder (mainly gingival hyperplasia), anorexia w/ some wt loss; sedation, tremor, hallucinations, ataxia, headache, nystagmus, diplopia, asterixis, "spots before eyes", dysarthria, dizziness, hypesthesia, vertigo, memory impairment, cognitive disorder, & extrapyramidal disorders including parkinsonism, encephalopathy in the absence of elevated ammonia levels, reversible & irreversible cerebral & cerebellar atrophy; congenital malformations & developmental disorders; transient hair loss, hair disorders (eg, abnormal hair texture & growth, hair colour changes), photosensitivity, erythema multiforme, SJS, serious skin reactions, nail & nail bed disorders; emotional upset, depression, psychosis, aggression, psychomotor hyperactivity, hostility, agitation, attention disturbance, abnormal behavior, learning disorders, & behavioral deterioration; weakness, decreased bone mass; thrombocytopenia, altered bleeding time, bruising, hematoma formation, & hemorrhage, relative lymphocytosis, macrocytosis, hypofibrinogenemia, leukopenia, eosinophilia, anemia including macrocytic w/ or w/o folate deficiency, bone marrow suppression, pancytopenia, aplastic anemia, agranulocytosis, & acute intermittent porphyria; minor LDH elevations, potentially serious hepatotoxicity; irregular menses, breast enlargement, galactorrhea, parotid gland swelling, hyperandrogenism (hirsutism, virilism, acne, male pattern alopecia, &/or increased androgen), hypothyroidism; hyperammonemia, hyponatremia, inappropriate ADH secretion, hyperglycinemia (elevated plasma glycine conc), insulin resistance & dyslipidemia; enuresis, renal failure, tubulointerstitial nephritis & UTI; male infertility including azoospermia, abnormal semen analysis & spermatozoa morphology, decrease sperm count & spermatozoa motility, aspermia; ear pain; myelodysplastic syndrome; pleura effusion; allergic reaction, anaphylaxis, edema of the extremities, lupus erythematosus, rhabdomyolysis, biotin/biotinidase deficiency, bone pain, bradycardia, cutaneous vasculitis, fever, & hypothermia.