Dilantin Oral

In Depth

Generic Name: PHENYTOIN EXTENDED CAPSULE - ORAL
Pronounced: (FEN-eh-toyn)

Dilantin Oral Side Effects

Headache, nausea, vomiting, constipation, dizziness, drowsiness, trouble sleeping, or nervousness may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

Phenytoin may cause swelling and bleeding of the gums. Massage your gums and brush and floss your teeth regularly to minimize this problem. See your dentist regularly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur:

unusual eye movements
loss of coordination
slurred speech
confusion
muscle twitching
double or blurred vision
tingling of the hands/feet
facial changes (e.g., swollen lips, butterfly-shaped rash around the nose/cheeks)
excessive hair growth
increased thirst or urination
unusual tiredness
bone or joint pain
easily broken bones

A small number of people who take anticonvulsants for any condition (such as seizure, bipolar disorder, pain) may experience depression, suicidal thoughts/attempts, or other mental/mood problems. Tell your doctor immediately if you or your family/caregiver notice any unusual/sudden changes in your mood, thoughts, or behavior including signs of depression, suicidal thoughts/attempts, thoughts about harming yourself.

For males, in the very unlikely event you have a painful or prolonged erection lasting 4 or more hours, stop using this drug and seek immediate medical attention, or permanent problems could occur.

Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: