What is PHENYTOIN (EPTOIN)?

Phenytoin is an antiepileptic drug occasionally utilized in the treatment of some seizure disorders also known as epilepsy. Seizure conditions affect the brain's ability to transmit electrical impulses and regulate nerve activity. Seizures are abnormal electrical discharges in the brain that temporarily distort the normal message transmission to the body. They produce alterations in consciousness, cause odd rhythmic or repetitive movements, jerking or twitching of limbs, and/or can lead to convulsions (a sudden uncontrollable attack) that contract muscles throughout the body. This test measures the amount of phenytoin in the blood. In the blood, phenytoin is highly bound to serum proteins. The unbound or free is pharmacologically active. Phenytoin works by reducing the electrical conductance among brain cells, blocking excessive electrochemical activity occurring in the brain during a seizure. Phenytoin levels have to be observed as very low levels of phenytoin can lead to seizures in an affected person and high levels of phenytoin result in phenytoin toxicity.

Why Get Tested?

The phenytoin test diagnosis the phenytoin concentration in the blood, to maintain a therapeutic level, and to diagnose the potential for toxicity. Phenytoin is utilized in seizures to control and treat them; that may begin during or after surgery to the brain or nervous system

Reason To Take Phenytoin Test

Symptoms observed are:

• Slurred speech
• Tremors
• hirsutism
• Low blood pressure
• Swelling of the gums and/or lymph nodes
• Insomnia
• Nausea
• Confusion
• Difficulty swallowing
• Fatigue
• Rashes
• changes in consciousness
• Alterations in sight, smell, and taste
• Uncontrolled muscular convulsions
• Loss of balance and falling
• Involuntary eye movement from side to side (nystagmus)

Preparations Needed For Phenytoin Test

No Fasting Required.
No other special preparations are required.

Sample Required?

• Specimen type: Serum (Blood Sample),
• Specimen collection procedure: Venipuncture Collection of blood from a vein, usually from the arm.