Zonisamide
About Zonisamide
Zonisamide is an oral prescription medication used to treat partial seizures in adults with epilepsy. It is typically prescribed alongside other seizure medications to help control and reduce the frequency of these episodes. By stabilising electrical activity in the brain, it supports overall seizure management.
For Zonisamide to work effectively, you must take it consistently every day at the same times as directed by your doctor. You can take this medication with or without food, but you should swallow the capsules whole with plenty of water. Drinking extra fluids and staying well-hydrated throughout the day can significantly lower your risk of developing kidney stones while on this treatment.
Many people taking Zonisamide experience mild side effects, like drowsiness, dizziness, or a loss of appetite. However, you must contact your doctor immediately if you notice serious symptoms such as severe skin rashes, difficulty breathing, decreased sweating, or sudden mood changes like depression or suicidal thoughts.
Before starting Zonisamide, tell your doctor if you have a history of kidney disease, liver problems, or a sulfa allergy. Do not take this medication if you have had a severe allergic reaction to sulfonamide drugs, as the active ingredient in Zonisamide belongs to this chemical family.
Zonisamide can interact with other medications that cause drowsiness, as well as alcohol, which can worsen dizziness and slow down your reaction times. If you are pregnant, planning to become pregnant, breastfeeding, or are an older adult, you should discuss the risks and benefits thoroughly with your doctor before starting this medication.
Uses of Zonisamide
Medicinal Benefits
Zonisamide provides critical support for individuals living with epilepsy by reducing the sudden, uncontrolled electrical disturbances in the brain. Achieving better control over these episodes allows patients to experience fewer disruptions in their daily lives. Some of the key benefits patients may experience include:
- Helps Reduce Seizure Frequency: By controlling excessive electrical activity in the brain, Zonisamide helps reduce the frequency of seizures, supporting more stable day-to-day functioning.
- Supports Greater Confidence in Daily Life: Better seizure control with Zonisamide can help reduce the uncertainty associated with unexpected seizures, allowing you to carry out daily activities with greater confidence and peace of mind.
- Enhances Long-Term Epilepsy Management: When used as prescribed, either alone or in combination with other anti-seizure medicines, Zonisamide helps provide effective long-term seizure control and supports overall epilepsy management.
Directions for Use
- Zonisamide can be taken with or without food as advised by your doctor.
- It is usually taken once or twice a day or as directed by the doctor.
- Swallow Zonisamide as a whole with a glass of water.
- Do not chew, crush, or break it.
Storage
Side Effects of Zonisamide
Common Side Effects (Usually mild):
- Drowsiness, fatigue, or feeling dizzy
- Loss of appetite or weight loss
- Difficulty concentrating or memory issues
- Nausea or upset stomach
- Double vision or blurry vision
Serious Side Effects (Call a doctor right away):
- Severe skin rash, peeling skin, or painful sores in your mouth
- Fever, sore throat, or swollen glands that do not go away
- Severe pain in your lower back or side, or blood in your urine (signs of kidney stones)
- Decreased sweating and feeling very hot, especially in warm weather
- New or worsening depression, anxiety, or thoughts of hurting yourself
- Rapid, deep breathing or feeling constantly tired and confused (signs of high acid levels in your blood)
Medicines Containing this Salt
View AllDrug Warnings
- Check your skin daily. Contact your doctor immediately if you notice any new rash, itching, or skin peeling, as this medication can cause rare but life-threatening skin reactions.
- Do not drive or operate heavy machinery until you know how Zonisamide affects you, as it can cause significant drowsiness and slow your reflexes.
- Monitor your mood closely. Have a family member or caregiver watch for sudden changes in your behaviour, depressive thoughts, or signs of self-harm.
- Tell all healthcare providers, including your dentist, that you are taking Zonisamide before undergoing any medical procedures or starting new prescriptions.
- Never stop taking this medicine abruptly. Doing so can cause a severe, continuous state of seizures that can be dangerous.
Drug Interactions
- Other carbonic anhydrase inhibitors (like topiramate or acetazolamide): Taking these alongside Zonisamide can increase the risk of metabolic acidosis (too much acid in the blood) and kidney stones.
- Sedatives and sleep aids: Medicines that cause drowsiness, such as benzodiazepines or muscle relaxants, can cause extreme sleepiness when taken with Zonisamide.
- Certain seizure medications (like phenytoin, carbamazepine, or phenobarbital): These drugs can speed up how your body processes Zonisamide, potentially lowering its effectiveness.
Drug-Drug Interactions Checker List:
Safety Advice
Alcohol
unsafeAvoid consumption of alcohol while taking Zonisamide as it may increase dizziness and sleepiness.
Pregnancy
cautionAvoid taking Zonisamide if you are pregnant unless prescribed by a doctor to lead to serious birth defects/congenital disabilities. Please consult your doctor if you have any concerns regarding this. Your doctor will prescribe only if the benefits outweigh the risks.
Breast Feeding
cautionZonisamide should not be taken by breastfeeding mothers as it passes into breast milk and could lead to side-effects for breastfed babies.
Driving
unsafeZonisamide causes drowsiness, sleepiness, and tiredness. Do not drive or operate machinery unless you are alert.
Liver
consult your doctorDose adjustment may be needed in patients with liver impairment. Please consult your doctor if you have a liver impairment or any concerns regarding this.
Kidney
consult your doctorDose adjustment may be needed in patients with kidney impairment. Please consult your doctor if you have kidney impairment or any concerns regarding this, your doctor will prescribe only if the benefits outweigh the risks.
Children
safe if prescribedZonisamide can be given to children above 6 years if prescribed by the doctor. The dose will be adjusted by the doctor depending upon the child's body weight.
Habit Forming
Diet & Lifestyle Advise
- Stay highly hydrated: Drink at least 6 to 8 glasses of water daily. This is critical to lower your risk of developing kidney stones, which is a known risk with zonisamide therapy.
- Avoid overheating: Since Zonisamide can reduce your ability to sweat, avoid extreme heat, saunas, and intense exercise in hot weather. Dress in cool layers and stay in air-conditioned spaces when temperatures rise.
- Maintain a consistent sleep schedule: Lack of sleep is a well-known trigger for seizures. Aim for 7 to 9 hours of quality sleep each night.
- Limit alcohol consumption: Alcohol can increase the sedative effects of Zonisamide, making you dangerously drowsy or dizzy, and can also trigger seizures.
- Keep a seizure diary: Track when your seizures occur, what you were doing, and any side effects you experience. This information is incredibly valuable for your doctor during check-ups.
Special Advise
- Regular monitoring of bicarbonate levels while taking Zonisamide is advised to prevent low blood bicarbonate levels.
- Zonisamide may cause low blood cell count, so if you have any red or purple spots on the body, let your doctor know about this.
Patients Concern
Disease/Condition Glossary
Epilepsy: Epilepsy is a sudden rush of electricity in the brain. It is a disorder of the nervous system that occurs due to disturbed nerve cell activity in the brain. In epilepsy, the brain's electrical rhythms become imbalanced, resulting in recurrent seizures. In patients with seizures, the typical brain electrical pattern is disrupted by sudden bursts of electrical impulses that affect an individual's consciousness, movements, or sensations. Seizures are of two types: generalised and partial seizures. Generalised seizures affect the entire brain, whereas partial seizures affect only a part of the brain. Seizures can cause uncontrollable muscle twitches and spasms. Stronger seizures may cause people to become confused or unconscious. Possible causes include high fever, trauma, genetic disorders, brain injury, or stroke.
FAQs
Zonisamide belongs to a group of medicines called anti-convulsants or anti-epileptics used to treat epilepsy (seizures/fits).
Zonisamide consists of zonisamide, which decreases the brain's excessive and abnormal nerve activity by blocking sodium and calcium currents in your brain and body. This reduces abnormal electrical activity between your nerve cells.
Zonisamide should be used with caution during hot weather, as it may increase the chance of having a heat stroke. Inform your doctor if you have heat intolerance or fever. To avoid this condition, it is advisable to drink a lot of cold fluid and water and move to a cooler place, especially in summer.
No, Zonisamide is not a habit-forming drug. However, it can cause side effects, especially when you stop taking it suddenly.
Consult your doctor before taking Zonisamide if you have had kidney stones. Your doctor will prescribe Zonisamide only if the benefits outweigh the risks. Zonisamide should be taken with caution in patients with kidney stones. You may be at increased risk of developing more kidney stones. Reduce the risk of kidney stones by drinking sufficient water.
Consult your doctor before taking Zonisamide if you have glaucoma. Zonisamide is contraindicated in patients with narrow-angle glaucoma. Zonisamide may cause blindness on long-term use in the case of patients with narrow-angle glaucoma.
Zonisamide contains Zonisamide as an active ingredient.
If you suddenly stop taking Zonisamide, your seizures may become worse. If required, your doctor will probably decrease your dose gradually.
In patients taking Zonisamide, severe muscle pain and/or weakness develop either in the presence or absence of a fever. It is recommended that you consult your doctor; they will perform specific tests to evaluate muscle damage and treat it accordingly.
Although the Food and Drug Administration (FDA) has not officially approved Zonisamide for children, quite a few research studies have shown that it has been given to children of various ages (even infants) with generally good results. However, it should be provided under the supervision of a doctor.
No, it does not impact on birth control pills. No reported interactions have been established as of now.
Zonisamide is excreted by the kidneys; patients with renal impairment or renal disease should be treated cautiously.
In some cases, you may experience certain common side effects such as dizziness, irritability, loss of appetite, memory impairment, double vision, confusion, depression, constipation, nausea, headache, and uncontrolled movements. Most of these side effects do not require medical attention and will resolve gradually over time. However, you are advised to talk to your doctor if you experience these side effects persistently.
Symptoms of overdose may include slow heartbeat, slowed breathing, dizziness, fainting and coma (loss of consciousness for a period of time).
Zonisamide may help control your condition but will not cure it. It may take two weeks or longer before you feel the full benefit of Zonisamide.
Before using this medication, you should inform your doctor about your medical history, including any ongoing medicines, to avoid potential interactions and minimize side effects.
Take the missed dose as soon as you remember unless it's almost time for your next dose. In this case, skip the missed dose and take your next dose at the regular time. Never take a double dose to make up for a missed one.
Taking more than the recommended dosage does not provide additional benefits and can increase the risk of adverse effects.
Avoid consuming alcohol along with Zonisamide as it could lead to increased dizziness and sleepiness.
Yes, some people experience a loss of appetite and subsequent weight loss while taking Zonisamide. If you notice a significant or sudden drop in weight, talk to your doctor to manage this effect safely.
No, you must never stop taking Zonisamide suddenly, even if you feel completely well. Stopping abruptly can cause your seizures to return more frequently or become harder to control. Talk to your doctor before making any changes to your medication schedule.
Yes, Zonisamide can increase your risk of developing kidney stones. To help prevent this, it is very important to drink plenty of water throughout the day. Talk to your doctor immediately if you experience sharp pain in your back or side or see blood in your urine.
Taking Zonisamide during pregnancy may pose risks to an unborn baby, including developmental issues. However, uncontrolled seizures also present serious risks to both the mother and baby. If you are pregnant or planning to become pregnant, talk to your doctor immediately to discuss the safest treatment plan.
You should contact your doctor right away or seek emergency medical care if you develop any skin rash, peeling, or hives while taking Zonisamide. This medicine can cause rare but severe, life-threatening allergic skin reactions. Talk to your doctor or pharmacist if you notice any skin changes.
Yes, Zonisamide can cause mood changes, depression, anxiety, or even thoughts of self-harm in some patients. It is vital to monitor your emotional well-being closely and have loved ones look out for changes in your behaviour. Talk to your doctor immediately if you experience new or worsening mental health symptoms.
Author Details
