Celontin Side Effects
What should I watch for?
Visit your doctor or health care professional for a regular check on your progress. Do not change brands or dosage forms of this medicine without discussing the change with your doctor or health care professional.
Wear a medical ID bracelet or chain, and carry a card that describes your disease and details of your medicine and dosage times.
You may get drowsy, dizzy, or have blurred vision. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. To reduce dizzy or fainting spells, do not sit or stand up quickly, especially if you are an older patient. Alcohol can increase drowsiness and dizziness. Avoid alcoholic drinks.
The use of this medicine may increase the chance of suicidal thoughts or actions. Pay special attention to how you are responding while on this medicine. Any worsening of mood, or thoughts of suicide or dying should be reported to your health care professional right away.
Women who become pregnant while using this medicine may enroll in the North American Antiepileptic Drug Pregnancy Registry by calling 1-888-233-2334. This registry collects information about the safety of antiepileptic drug use during pregnancy.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Attempts at killing oneself
feeling that others are watching you or controlling your behavior
feeling that others can hear your thoughts
feeling, seeing, or hearing things that are not there
severe mood or mental changes
Incidence not known
Attack, assault, or force
blistering, peeling, or loosening of the skin
blood in the urine
bloody, black, or tarry stools
cough or hoarseness
feeling sad or empty
joint or muscle pain
lack of appetite
loss of interest or pleasure
lower back or side pain
mood or mental changes
painful or difficult urination
red skin lesions, often with a purple center
red, irritated eyes
shakiness and unsteady walk
shortness of breath
sores, ulcers, or white spots on the lips or in the mouth
swelling around the eyes
trouble with concentrating
trouble with sleeping
unexplained bleeding or bruising
unsteadiness, trembling, or other problems with muscle control or coordination
unusual bleeding or bruising
unusual tiredness or weakness
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Change in consciousness
difficult or troubled breathing
irregular, fast or slow, or shallow breathing
loss of consciousness
pale or blue lips, fingernails, or skin
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not known
change in color vision
difficulty having a bowel movement (stool)
difficulty seeing at night
hives or welts
increased sensitivity of the eyes to sunlight
loss of appetite
nausea or vomiting
pain or discomfort in the chest, upper stomach, or throat
redness of the skin
unable to sleep
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.