Onfi (Generic Clobazam): Complete Medication Guide
Key Takeaways
Clobazam is a seizure medication that works by calming overactive brain activity to prevent seizures.
It's commonly used to treat Lennox-Gastaut syndrome and as an add-on therapy for other types of epilepsy.
Common side effects include drowsiness, loss of appetite, and difficulty concentrating.
Generic clobazam is cost-effective alternative to brand-name drugs and works the same way as Onfi.
Always take it exactly as prescribed and don't stop taking it without talking to your doctor.
Onfi (Generic Clobazam) Overview
Clobazam is an anti-seizure medication that belongs to a class of drugs called benzodiazepines. It works by slowing down electrical activity in the brain that causes seizures. By calming overactive nerve signals, clobazam helps prevent seizures from starting or reduces how often they happen.
This medication is commonly prescribed to treat Lennox-Gastaut syndrome, a serious type of childhood epilepsy that causes multiple seizure types. Doctors also use clobazam as an add-on medication when other seizure treatments alone aren't working well enough. The generic version contains the same active ingredient as the brand-name Onfi and works in exactly the same way. Learning about generic vs brand-name drugs can help you understand why both options are equally safe and effective.
Clobazam comes as a tablet or liquid suspension, making it easier for different age groups to take. It's typically given twice a day with or without food, though your doctor will determine the best schedule for your specific needs.
Side Effects
Clobazam is generally well-tolerated, especially when you start with a low dose and increase gradually. Most side effects are mild and may improve as your body adjusts to the medication.
Common Side Effects
Drowsiness or fatigue — Feeling unusually tired or sleepy is one of the most common effects, especially when starting the medication.
Loss of appetite — You may eat less than usual or feel less interested in food.
Difficulty concentrating — Some people have trouble focusing on tasks or remembering things while taking clobazam.
Irritability or mood changes — You might feel more irritable, anxious, or have sudden changes in your mood.
Dizziness — Feeling lightheaded or unsteady, particularly when standing up quickly.
Headache — Mild to moderate headaches may occur, especially early in treatment.
Serious Side Effects
Allergic reactions — Rash, hives, swelling of the face or throat, or difficulty breathing require immediate medical attention.
Severe skin reactions — Including Stevens-Johnson syndrome, a rare but serious condition with blistering skin and mucous membranes.
Suicidal thoughts or behavior — Some people taking seizure medications experience mood changes or thoughts of harming themselves.
Severe drowsiness or sedation — If clobazam makes you extremely sleepy or difficult to wake, contact your doctor.
Liver problems — Yellowing of skin or eyes, dark urine, or severe abdominal pain may signal liver damage.
When to Seek Medical Attention
Contact your doctor if you experience persistent drowsiness, significant mood changes, or loss of appetite that affects your nutrition. Seek immediate emergency care if you have signs of an allergic reaction, difficulty breathing, severe skin reactions, or any suicidal thoughts. Don't wait to report unusual changes in behavior or thinking to your healthcare provider, as these can be managed with dose adjustments or other treatment options.
Dosage
Age Group or Condition |
Starting Dose |
Maintenance Dose |
Special Notes |
Children (2-16 years) |
5 mg once daily |
10-20 mg per day in 2 doses |
Dosage based on body weight; gradual increase over weeks |
Children (>30 kg) |
10 mg daily |
20-40 mg per day in 2 doses |
May increase more rapidly than lighter children |
Adults |
10-20 mg daily |
20-40 mg per day in 2 doses |
Start low and increase gradually over 1-2 weeks |
Maximum Daily Dose |
N/A |
40-80 mg per day |
Depends on response and tolerance; doctor determines |
Important: Don't miss doses, as this can reduce how well the medication works to prevent seizures. Never stop taking clobazam suddenly without talking to your doctor, even if you feel better or experience side effects. If you miss a dose, take it as soon as you remember, but skip it if it's almost time for your next dose.
Drug Interactions
Clobazam can interact with other medications, supplements, and substances. These interactions may reduce how well clobazam works, increase side effects, or cause other problems. Always tell your doctor about every medication, vitamin, or supplement you're taking.
Other Seizure Medications
Taking clobazam with other anti-seizure drugs like phenytoin or carbamazepine may change how well each medication works. Your doctor may need to adjust doses or monitor your seizure control more closely.
Sedating Medications
Combining clobazam with medications that cause drowsiness—such as opioids, sleep aids, or antihistamines—can increase sedation and impair your ability to drive or operate machinery safely.
Alcohol
Drinking alcohol while taking clobazam increases drowsiness, dizziness, and coordination problems. It may also reduce how well the medication prevents seizures.
Birth Control Pills
Clobazam may reduce the effectiveness of hormonal birth control, increasing your risk of an unwanted pregnancy. Discuss alternative contraception methods with your doctor.
Antifungal Medications
Drugs like ketoconazole or fluconazole may increase clobazam levels in your blood, raising the risk of side effects. Your doctor may monitor your response more carefully.
Continue Learning
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Pros and Cons
Pros
Highly effective for Lennox-Gastaut syndrome and other difficult-to-treat seizure types.
Can be used as an add-on medication to improve control when other drugs aren't enough.
Available as both tablets and liquid, making it flexible for different ages and preferences.
Generic clobazam is a cost-effective alternative to brand-name Onfi with the same effectiveness.
Relatively rapid onset of action compared to some other seizure medications.
Cons
Common side effects like drowsiness can interfere with school, work, or daily activities.
Requires twice-daily dosing, which may be difficult to remember consistently.
Small risk of serious allergic reactions or skin conditions requiring immediate medical attention.
May interact with many other medications, requiring careful monitoring by your doctor.
Carries the FDA black box warning about increased risk of suicidal thoughts and behavior.
Frequently Asked Questions
Get answers to common questions about clobazam.
Some people see improvement in seizure control within days, while others may take weeks to notice a difference. Your doctor typically waits 1-2 weeks after each dose increase before deciding if the medication is working well enough. This gradual approach helps find the right dose while minimizing side effects.
No, alcohol should be avoided while taking clobazam. Combining alcohol with this medication increases drowsiness, dizziness, and poor coordination. Alcohol may also reduce how well clobazam prevents seizures, putting you at higher risk of breakthrough seizures.
Yes, generic clobazam contains the same active ingredient as Onfi and works exactly the same way. The FDA requires generic drugs to meet the same strict quality and safety standards as brand-name medications. Understanding generic vs brand-name drugs helps you feel confident in choosing the more affordable option.
Take the missed dose as soon as you remember, unless it's almost time for your next scheduled dose. Never double up on doses to make up for a missed one. If you frequently forget doses, ask your doctor or pharmacist about pill organizers or phone reminders to help you stay on track.
Yes, clobazam is approved for use in children as young as 2 years old. Dosage is carefully calculated based on the child's body weight. Your pediatrician or neurologist will start with a low dose and increase it slowly while watching for side effects and seizure control.
The Bottom Line
Clobazam is an effective anti-seizure medication that helps control Lennox-Gastaut syndrome and other difficult-to-treat epilepsy types. The generic version works just as well as brand-name Onfi while being more affordable, making seizure management accessible to more people. Common side effects like drowsiness usually improve over time, and serious side effects are rare when the medication is used correctly. Your doctor will work with you to find the right dose that controls your seizures with minimal side effects. This information is educational and does not replace advice from your healthcare provider.
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