What is the most important information I should know about Valparin?

• In rare cases, Valparin has caused life-threatening liver failure, especially in children younger than 2 years old. Children of this age may be at even greater risk for liver problems if they use more than one seizure medication, if they have a metabolic disorder, or if they have a brain disease causing mental impairment (such as Creutzfeldt-Jacob disease, Huntington disease, multiple sclerosis, or a brain injury or infection).
• Valparin has also caused rare cases of life-threatening pancreatitis (inflammation of the pancreas). Pancreatitis can come on suddenly and symptoms may start even after you have been taking Valparin for several years.
• Seek emergency medical attention if the person taking this medicine has nausea, vomiting, stomach pain, or loss of appetite, low fever, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes). These symptoms may be early signs of liver damage. Some of these symptoms may also be early signs of pancreatitis.
• Do not use this medication without your doctor's consent if you are pregnant. It could cause harm to the unborn baby. Use an effective form of birth control, and tell your doctor if you become pregnant during treatment.
• Do not stop taking the medication even if you feel better. It is important to take Valparin regularly to prevent seizures from recurring. Call your doctor promptly if this medicine does not seem to be working as well in preventing your seizures.
• Swallow the capsule whole. Do not crush, chew, or break a capsule because the medicine may irritate your mouth or throat when you swallow it.
• Carry an ID card or wear a medical alert bracelet stating that you are taking Valparin, in case of emergency. Any doctor, dentist, or emergency medical care provider who treats you should know that you are taking Valparin.
• Avoid using other drugs that make you sleepy (such as other seizure medicines, alcohol, cold medicine, pain medication, muscle relaxers, and medicine for depression or anxiety). They can add to sleepiness caused by Valparin.

What is Valparin?

• Valparin affects chemicals in the body that may be involved in causing seizures.
• Valparin is used to treat various types of seizure disorders. Valparin is sometimes used together with other seizure medications.
• Valparin may also be used for purposes other than those listed in this medication guide.

What should I discuss with my healthcare provider before taking Valparin?

• In rare cases, Valparin has caused life-threatening liver failure, especially in children younger than 2 years old. Children of this age may be at even greater risk for liver problems if they use more than one seizure medication, if they have a metabolic disorder, or if they have a brain disease causing mental impairment (such as Creutzfeldt-Jacob disease, Huntington disease, multiple sclerosis, or a brain injury or infection).
• Valparin has also caused rare cases of life-threatening pancreatitis (inflammation of the pancreas). Pancreatitis can come on suddenly and symptoms may start even after you have been taking Valparin for several years. Do not take Valparin if you have liver disease or a urea cycle disorder.
• Before taking Valparin, tell your doctor if you have:
  • a bleeding or blood clotting disorder;
  • a history of head injury, brain disorder, or coma;
  • a family history of a urea cycle disorder;
  • a family history of infant deaths with unknown cause; or
  • HIV or CMV (cytomegalovirus) infection.
• If you have any of these conditions, you may not be able to use Valparin, or you may need a dosage adjustment or special tests during treatment.
• FDA pregnancy category D. This medication can cause harm to an unborn baby. Do not use Valparin without your doctor's consent if you are pregnant. Tell your doctor if you become pregnant during treatment. Use an effective form of birth control while you are using this medication.
• Valparin passes into breast milk and could harm a nursing infant. Do not take Valparin without telling your doctor if you are breast-feeding a baby.
• Valparin should not be given to a child younger than 2 years of age without a doctor's consent.
• Older adults may be more sensitive to sleepiness caused by this medicine.

How should I take Valparin?

• Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor.
• Take each dose with a full glass of water. Drink plenty of water while you are taking this medication. Your dose may need to be changed if you do not get enough fluids each day.
• Measure the liquid form of Valparin with a special dose-measuring spoon or cup, not a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist where you can get one.
• To be sure this medication is not causing harmful effects, your liver function will need to be tested. It is important that you not miss any scheduled visits to your doctor.
• Do not stop taking the medication even if you feel better. It is important to take Valparin regularly to prevent seizures from recurring. Get your prescription refilled before you run out of medicine completely. Call your doctor promptly if this medicine does not seem to be working as well in preventing your seizures.
• Swallow the capsule whole. Do not crush, chew, or break a capsule because the medicine may irritate your mouth or throat when you swallow it.
• Carry an ID card or wear a medical alert bracelet stating that you are taking Valparin, in case of emergency. Any doctor, dentist, or emergency medical care provider who treats you should know that you are taking Valparin.
• Store Valparin at room temperature away from moisture and heat.

What happens if I miss a dose?

• Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

• Seek emergency medical attention if you think you have used too much of this medicine.
• Symptoms of a Valparin overdose may include sleepiness or drowsiness, shallow breathing, weak pulse, or loss of consciousness.

What should I avoid while taking Valparin?

• Avoid drinking alcohol, which can increase some of the side effects of Valparin.
• Avoid using other medicines that make you sleepy (such as cold medicine, pain medication, muscle relaxers, and medicine for seizures, depression or anxiety). They can add to sleepiness caused by Valparin.
• Valparin can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
• Avoid exposure to sunlight or artificial UV rays (sunlamps or tanning beds). Valparin can make your skin more sensitive to sunlight and sunburn may result. Use a sunscreen (minimum SPF 15) and wear protective clothing if you must be out in the sun.

What are the possible side effects of Valparin?

• Seek emergency medical attention if the person taking this medicine has nausea, vomiting, stomach pain, or loss of appetite, low fever, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes). These symptoms may be early signs of liver damage. Some of these symptoms may also be early signs of pancreatitis.
• Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
• Call your doctor at once if you have any of these serious side effects:
  • unexplained weakness with vomiting and confusion or fainting;
  • easy bruising or bleeding, unusual weakness;
  • fever, skin rash, swollen glands;
  • fever, chills, body aches, flu symptoms;
  • urinating less than usual;
  • blood in your urine;
  • hallucinations (seeing things that aren't there);
  • weakness, lack of coordination;
  • a red, blistering, peeling skin rash;
  • extreme drowsiness;
  • unusual bleeding or bruising; or
  • double vision or back-and-forth movements of the eyes.
• Continue using Valparin and talk with your doctor if you have any of these less serious side effects:
  • drowsiness or weakness;
  • diarrhea, constipation, upset stomach;
  • depression, anxiety, or other emotional changes;
  • changes in your menstrual periods;
  • enlarged breasts;
  • tremor (shaking);
  • hair loss;
  • weight changes;
  • a red, blistering, peeling skin rash;
  • vision changes; or
  • unusual or unpleasant taste in your mouth.
• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect Valparin?

• Before taking Valparin, tell your doctor if you are using any of the following drugs:
  • topiramate (Topamax);
  • tolbutamide (Orinase);
  • a blood thinner such as warfarin (Coumadin);
  • aspirin or acetaminophen (Tylenol);
  • zidovudine (Retrovir);
  • clozapine (Clozaril, Fazaclo);
  • diazepam (Valium);
  • meropenem (Merrem);
  • rifampin (Rifadin, Rimactane, Rifater);
  • ethosuximide (Zarontin); or
  • another seizure medicine such as phenytoin (Dilantin), carbamazepine (Tegretol, Carbatrol), phenobarbital (Luminal, Solfoton), felbamate (Felbatol), lamotrigine (Lamictal), or clonazepam (Klonopin).
• If you are using any of these drugs, you may not be able to use Valparin, or you may need dosage adjustments or special tests during treatment.
• There may be other drugs not listed that can affect Valparin. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.