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HOME >> API >> API List 3 >> Valproic Acid >> Consumer Information

CONSUMER INFORMATION
Valproic Acid CAS Registry Number 99-66-1

Warnings

This medication has rarely caused serious (sometimes fatal) liver problems. Children less than 2 years old are more likely to develop severe liver problems, especially if they have metabolic problems, severe seizures with mental retardation, brain disease (organic) or if they take more than one drug for seizures. If valproic acid is being used in patients with these conditions, then it should not be taken with additional anti-seizure medications. Liver function tests should be performed before and during treatment.

Early signs of serious liver problems include vomiting, unusual tiredness, swelling of the face or loss of seizure control in patients with seizure disorder. Tell your doctor immediately if you develop any of these symptoms.

Uses

This medication is used to treat seizure disorders. It works by restoring the balance of certain natural substances (neurotransmitters) in the brain.
This drug may also be used for the prevention of migraine headaches and treatment of certain psychiatric conditions (e.g., manic phase of bipolar disorder, schizophrenia).

Side Effects

Diarrhea, dizziness, drowsiness, hair loss, blurred/double vision, change in menstrual periods, ringing in the ears, shakiness (tremor), unsteadiness, weight changes may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

This medication rarely may cause mood or behavior changes, such as anxiety, agitation, hostility, pressured/rapid speech, or thoughts of suicide. Tell your doctor immediately if you develop unusual (possibly sudden) mood changes.

Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: dark urine, persistent nausea/vomiting, severe stomach/abdominal pain, yellowing eyes or skin.

Severe (sometimes fatal) brain disorder (encephalopathy) has rarely occurred, particularly in patients with certain metabolic disorders (urea cycle disorders). Tell your doctor immediately if you develop unexplained weakness and vomiting or sudden mental changes.

A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

Precautions

This medication should not be used if you have certain medical conditions. Before using this drug, consult your doctor or pharmacist if you have: liver disease, pancreatitis, certain metabolic disorders (urea cycle disorders).

Before using this medication, tell your doctor or pharmacist your medical history, especially of: alcohol abuse, bleeding problems, brain disease (dementia), kidney disease, low body water (dehydration), poor nutrition.

Before having surgery, tell your doctor or dentist that you are taking valproic acid.

This drug may make you dizzy, drowsy, or cause blurred vision. Use caution engaging in activities requiring alertness or clear vision such as driving or using machinery. Do not engage in such activities until you know how this medication affects you. Limit alcoholic beverages.

Caution is advised when using this drug in the elderly because they may be more sensitive to its side effects, especially drowsiness or tremor.
This medication is not recommended for use during pregnancy due to the possible risk of birth defects and harm to an unborn baby. Do not suddenly stop taking this medication unless directed by your doctor. Suddenly stopping your medication could cause a severe, possibly fatal, seizure.

Interactions

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: certain antidepressants , certain benzodiazepines  certain antibiotics  other medications for seizure  rifampin, vorinostat, warfarin, zidovudine.

Low-dose aspirin, as prescribed by your doctor for specific medical reasons such as heart attack or stroke prevention (usually these dosages are 81-325 milligrams per day), should be continued. Consult your doctor or pharmacist if you are using aspirin for any reason.

Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: antihistamines that cause drowsiness ( medicine for sleep , muscle relaxants, narcotic pain relievers , psychiatric medicines  such as chlorpromazine.

This drug may affect certain lab tests (e.g., urine ketones). Make sure laboratory personnel and your doctors know you use this medication.

Information Associated with Product:
DRUG DESCRIPTION DOSAGE SIDE EFFECTS PRECAUTIONS INTERACTION CONSUMER INFORMATION >>
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