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The following serious adverse reactions are described below and elsewhere in the labeling:

  • Hepatic failure [see WARNINGS AND PRECAUTIONS]
  • Birth defects [see WARNINGS AND PRECAUTIONS]
  • Decreased IQ following in utero exposure [see WARNINGS AND PRECAUTIONS]
  • Pancreatitis [see WARNINGS AND PRECAUTIONS]
  • Hyperammonemic encephalopathy [see WARNINGS AND PRECAUTIONS]
  • Suicidal behavior and ideation [see WARNINGS AND PRECAUTIONS]
  • Bleeding and other hematopoietic disorders [see WARNINGS AND PRECAUTIONS]
  • Hypothermia [see WARNINGS AND PRECAUTIONS]
  • Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)/Multiorgan hypersensitivity reactions [see WARNINGS AND PRECAUTIONS]
  • Somnolence in the elderly [see WARNINGS AND PRECAUTIONS]

Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.

Epilepsy

Based on a placebo-controlled trial of adjunctive therapy for treatment of complex partial seizures, Depakote was generally well tolerated with most adverse reactions rated as mild to moderate in severity. Intolerance was the primary reason for discontinuation in the Depakotetreated patients (6%), compared to 1% of placebo-treated patients.

In a long term (12-month) safety study in pediatric patients (n=169) between the ages of 3 and 10 years old, no clinically meaningful differences in the adverse event profile were observed when compared to adults.

Table 2 lists treatment-emergent adverse reactions which were reported by ≥ 5% of Depakotetreated patients and for which the incidence was greater than in the placebo group, in the placebo-controlled trial of adjunctive therapy for treatment of complex partial seizures. Since patients were also treated with other antiepilepsy drugs, it is not possible, in most cases, to determine whether the following adverse reactions can be ascribed to Depakote alone, or the combination of Depakote and other antiepilepsy drugs.

Table 2: Adverse Reactions Reported by ≥ 5% of Patients Treated with Valproate During Placebo-Controlled Trial of Adjunctive Therapy for Complex Partial Seizures

Body System/Event Depakote (%)
(n = 77)
Placebo (%)
(n = 70)
Body as a Whole
  Headache 31 21
  Asthenia 27 7
  Fever 6 4
Gastrointestinal System
  Nausea 48 14
  Vomiting 27 7
  Abdominal Pain  23 6
  Diarrhea 13 6
  Anorexia 12 0
  Dyspepsia 8 4
  Constipation 5 1
Nervous System
  Somnolence 27 11
  Tremor 25 6
  Dizziness 25 13
  Diplopia 16 9
  Amblyopia/Blurred Vision 12 9
  Ataxia 8 1
  Nystagmus 8 1
  Emotional Lability 6 4
  Thinking Abnormal 6 0
  Amnesia 5 1
Respiratory System
  Flu Syndrome 12 9
  Infection 12 6
  Bronchitis 5 1
  Rhinitis 5 4
Other
  Alopecia 6 1
  Weight Loss 6 0

Table 3 lists treatment-emergent adverse reactions which were reported by ≥ 5% of patients in the high dose valproate group, and for which the incidence was greater than in the low dose group, in a controlled trial of Depakote monotherapy treatment of complex partial seizures. Since patients were being titrated off another antiepilepsy drug during the first portion of the trial, it is not possible, in many cases, to determine whether the following adverse reactions can be ascribed to Depakote alone, or the combination of valproate and other antiepilepsy drugs.

Table 3: Adverse Reactions Reported by ≥ 5% of Patients in the High Dose Group in the Controlled Trial of Valproate Monotherapy for Complex Partial Seizuresa

Body System/Event High Dose (%)
(n = 131)
Low Dose (%)
(n = 134)
Body as a Whole
  Asthenia 21 10
Digestive System
  Nausea 34 26
  Diarrhea 23 19
  Vomiting 23 15
  Abdominal Pain 12 9
  Anorexia 11 4
  Dyspepsia 11 10
Hemic/Lymphatic System
  Thrombocytopenia 24 1
  Ecchymosis 5 4
Metabolic/Nutritional
  Weight Gain 9 4
  Peripheral Edema 8 3
Nervous System
  Tremor 57 19
  Somnolence 30 18
  Dizziness 18 13
  Insomnia 15 9
  Nervousness 11 7
  Amnesia 7 4
  Nystagmus  7 1
  Depression 5 4
Respiratory System
  Infection 20 13
  Pharyngitis 8 2
  Dyspnea 5 1
Skin and Appendages
  Alopecia 24 13
Special Senses
  Amblyopia/Blurred Vision 8 4
  Tinnitus 7 1

a Headache was the only adverse event that occurred in ≥ 5% of patients in the high dose group and at an equal or greater incidence in the low dose group.

The following additional adverse reactions were reported by greater than 1% but less than 5% of the 358 patients treated with valproate in the controlled trials of complex partial seizures:

Body as a Whole: Back pain, chest pain, malaise.

Cardiovascular System: Tachycardia, hypertension, palpitation.

Digestive System: Increased appetite, flatulence, hematemesis, eructation, pancreatitis, periodontal abscess.

Hemic and Lymphatic System: Petechia.

Metabolic and Nutritional Disorders: SGOT increased, SGPT increased.

Musculoskeletal System: Myalgia, twitching, arthralgia, leg cramps, myasthenia.

Nervous System: Anxiety, confusion, abnormal gait, paresthesia, hypertonia, incoordination, abnormal dreams, personality disorder.

Respiratory System: Sinusitis, cough increased, pneumonia, epistaxis.

Skin and Appendages: Rash, pruritus, dry skin.

Special Senses: Taste perversion, abnormal vision, deafness, otitis media.

Urogenital System: Urinary incontinence, vaginitis, dysmenorrhea, amenorrhea, urinary frequency.

Post-Marketing Experience

The following adverse reactions have been identified during post approval use of Depakote. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Dermatologic

Photosensitivity, erythema multiforme, toxic epidermal necrolysis, and Stevens-Johnson syndrome.

Psychiatric

Emotional upset, psychosis, aggression, psychomotor hyperactivity, hostility, disturbance in attention, learning disorder, and behavioral deterioration.

Neurologic

There have been several reports of acute or subacute cognitive decline and behavioral changes (apathy or irritability) with cerebral pseudoatrophy on imaging associated with valproate therapy; both the cognitive/behavioral changes and cerebral pseudoatrophy reversed partially or fully after valproate discontinuation.

Musculoskeletal

Fractures, decreased bone mineral density, osteopenia, osteoporosis, and weakness.

Hematologic

Relative lymphocytosis, macrocytosis, leukopenia, anemia including macrocytic with or without folate deficiency, bone marrow suppression, pancytopenia, aplastic anemia, agranulocytosis, and acute intermittent porphyria.

Endocrine

Irregular menses, secondary amenorrhea, breast enlargement, galactorrhea, parotid gland swelling, polycystic ovary disease, decreased carnitine concentrations, hyponatremia, hyperglycinemia, and inappropriate ADH secretion.

There have been rare reports of Fanconi's syndrome occurring chiefly in children.

Genitourinary

Enuresis and urinary tract infection.

Special Senses

Hearing loss.

Other

Allergic reaction, anaphylaxis, developmental delay, bone pain, bradycardia, and cutaneous vasculitis.