Valproate

Valproate formulations treat certain seizures; specific divalproex formulations also treat bipolar mania and prevent migraine. The reason for use determines the dose, monitoring, and reproductive precautions.

Valproate affects GABA signaling and several ion channels involved in nerve activity. Its broad actions contribute to benefit and also to important liver, metabolic, and reproductive risks.

The dose is often increased gradually to balance benefit and side effects. Track the condition being treated and report changes after each adjustment.

• Follow the exact formulation and schedule. Food may reduce nausea.
• Swallow delayed-release and ER tablets whole. Labeled sprinkle capsules can be opened onto soft food and swallowed without chewing.
• If you miss a dose, take it when you remember unless it is almost time for the next dose. Then skip it. Do not double a dose.
• Consult with your provider before stopping or switching. Follow dose-timing instructions for a blood-level test.

• Nausea, tremor, or dizziness
• Sleepiness or slowed thinking
• Weight gain
• Hair thinning or menstrual changes

Some side effects resolve with time; others may require a change of medication. Discuss persistent or bothersome side effects with your provider.

Report changes in mood, behavior, concentration, or suicidal thoughts. Antiseizure medicines carry a warning about suicidal thoughts and behavior.

Keep follow-up appointments. Your provider may adjust treatment based on symptoms, kidney or liver function, other medicines, and any recommended laboratory tests.

Keep liver tests, blood counts and platelets, and drug-level checks as directed. Serious liver injury is especially important early in treatment. Ammonia testing may be needed for unexplained confusion or vomiting.

For a suspected overdose, call Poison Control at 1-800-222-1222 immediately, even if you feel well. Call 911 for a seizure, collapse, trouble breathing, or inability to wake.

Valproate can cause major birth defects and adverse developmental effects. It is contraindicated for migraine prevention during pregnancy and in people who can become pregnant without effective contraception. For epilepsy or bipolar disorder, use in pregnancy or those planning pregnancy is generally reserved for situations when alternatives are inadequate. Discuss contraception and plans to father a child.

Liver disease, urea-cycle disorders, and certain POLG-related mitochondrial disorders can rule out treatment. Discuss pancreatitis, bleeding, pregnancy, and breastfeeding.

Review all your medications with your provider, including over-the-counter medicines and supplements. Have new medications checked before taking them.

Valproate raises lamotrigine exposure and serious-rash risk. Topiramate can add high-ammonia or low-temperature reactions.

Carbapenem antibiotics can sharply lower levels. Aspirin, anticoagulants, cannabidiol, and other medicines may add bleeding or liver risks.

Use reminders and arrange refills before you run out.

Avoid driving until you know how treatment affects you; seizure-related driving restrictions may also apply.

Keep medication in its labeled container, away from excess heat and moisture and out of reach of children and pets. Do not share it. Ask a pharmacy about disposal of unused medication.