Side Effects:

Common Nystagmus (involuntary eye movement), Double vision, Sleepiness, Anemia, Peripheral neuropathy (tingling and numbness of feet and hand), Gingival hyperplasia, Increased hair growth, Osteoporosis.

Expert advice for Fentoin Tablet ER
Fentoin should be taken at the same time every day to maintain consistent levels in your body. Do not stop using Fentoin without talking to your doctor, even if you feel better. It causes sleepiness or drowsiness. If this happens to you, do not drive or use machinery. Avoid consuming alcohol when taking the Fentoin, as it may cause excessive sleepiness or drowsiness. It may increase blood sugar levels.Inform your doctor if you are taking any medicines to treat diabetes. Do not start any medicine including herbal or ayurvedic without telling your doctor. As it may significantly change the Fentoin levels. Inform your doctor if you have ever been diagnosed with kidney or liver problems. Inform your doctor if you are pregnant or planning to conceive or breastfeeding.

Frequently Asked Questions

Q. How does Fentoin work?
Fentoin is used to control seizures (fits) in epilepsy patients and it works by suppressing the abnormal and excessive activity of the nerve cells in the brain.

Q. Does Fentoin cause gingival hyperplasia?
Fentoin is known to cause gingival hyperplasia (enlarged gums). To avoid this, you must maintain a good dental hygiene (taking proper care of your teeth and gums). Please consult your doctor if you have enlarged gums after taking Fentoin.

Q. Does Fentoin cause osteomalacia?
Osteomalacia (softening of the bones) has been associated with long-term (>10 years) use of Fentoin by patients with chronic epilepsy. There have been reports of bone disorders including osteopenia (reduced protein and mineral content of bone tissue) and osteoporosis (thinning of the bone) and fractures with Fentoin. Please consult your doctor for further information.

Q. Can I take Fentoin with aspirin?
Fentoin can decrease the levels of aspirin by increasing its metabolism (breakdown) and hence decrease its effect. Please consult your doctor before taking the two medicines together.

Q. Can I take Fentoin with ibuprofen?
Fentoin can be taken with ibuprofen. No drug-drug interactions have been reported between the two. However, interactions can occur. Please consult your doctor before taking the two medicines together.

Q. Can I take Fentoin with paracetamol?
Fentoin decreases the level of paracetamol by increasing its metabolism (breakdown). Increased metabolism of paracetamol can increase the levels of substances that can cause liver damage. Please consult your doctor before taking the two medicines together.

Q. Is Fentoin a narcotic?
Fentoin is not a narcotic substance. Fentoin belongs to a group of medicines known as anti-epileptic medicines, these medicines are used to treat epilepsy.

Q. Is Fentoin a controlled substance?
Fentoin is not a controlled substance under the Controlled Substance Act (CSA). A controlled substance is generally a drug or chemical whose manufacture, possession or use is regulated by a government.

Q. Is Fentoin dialyzable?
Fentoin is not dialyzable by a conventional hemodialysis machine but can be dialyzed by a high permeability type of hemodialysis. To know more about the different types of dialysis and dialysability of Fentoin, please consult your doctor.

Q. Is Fentoin teratogenic (cause birth defects)?
Fentoin is teratogenic. Based on human experience, Fentoin is suggested to cause congenital malformations (birth defects) when given during pregnancy. It can cause defects of the heart, brain, fingers and can decrease the growth of the unborn baby.

Q. Is Fentoin a cytochrome P450 (CYP450) inducer?
Cytochrome P450 (CYP450) is an enzyme which causes metabolism (breakdown) of many drugs. Fentoin is a CYP450 enzyme inducer (increases the working of CYP450) causing increased breakdown of some medicines given along with Fentoin (known as drug-drug interactions). Please consult your doctor before taking any medicines along with Fentoin as it may affect the metabolism of the medicines which are metabolized by CYP450 for example Vitamin D.

Q. Is Fentoin basic or acidic?
Fentoin is a weakly acidic drug.

Q. Is Fentoin addictive?
Fentoin has not been reported to have any addictive potential and it does not show any symptoms of dependence. However, it should be taken for the duration as advised by your doctor.

Q. Does Fentoin get you high?
Fentoin does not give you a high.

Q. Does Fentoin cause hyponatremia?
Fentoin does not cause hyponatremia (low sodium levels). However, Fentoin is known to cause hypernatremia (high serum sodium level >145 mmol/L).

Q. Does Fentoin cause QT prolongation?
Fentoin is not known to cause QT prolongation (abnormal heart rhythm). However, it can rarely cause abnormal heart rhythms. Please talk to your doctor if you have any abnormal heart rhythm (beats) while taking Fentoin.

Q. Does Fentoin affect thyroid?
Thyroid function may get affected while you are taking Fentoin, especially in children. Thyroid function should be monitored while taking Fentoin. Please consult your doctor if you have hypothyroidism or a history of hypothyroidism.

Q. Does Fentoin cause weight gain?
Fentoin has not been reported to cause weight gain. However, weight loss can occur with longer term use of a higher dose of Fentoin. Please consult your doctor if you experience weight gain after taking Fentoin.

Q. Does Fentoin make you sleepy (sedation)?
Fentoin can make you feel sleepy (sedation, somnolence, and drowsiness). Please consult your doctor if you feel very sleepy after taking Fentoin, especially during the first few weeks of treatment or following a dose increase. Talk to your doctor as you may be advised not to drive or use machines until it is established that your ability to perform such activities is not affected.

Q. Does Fentoin affect birth control?
Fentoin does affect birth control. Fentoin can decrease the effect of oral contraceptives (birth control pills) which can make the contraceptive (birth control) effect unreliable. Please talk to your doctor if you are asked to take the two medicines together as you may need to use extra protection for birth control.