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Drug Info > O > Olanzapine ODT by Pro Doc
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Brand Name
Olanzapine ODT by Pro Doc

Common Name
olanzapine


In this drug factsheet:



What side effects are possible with this medication?

Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent.

The side effects listed below are not experienced by everyone who takes this medication. If you are concerned about side effects, discuss the risks and benefits of this medication with your doctor.

The following side effects have been reported by at least 1% of people taking this medication. Many of these side effects can be managed, and some may go away on their own over time.

Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.

  • constipation
  • dizziness, especially when rising quickly from a lying or sitting position
  • drowsiness
  • dry mouth or eyes
  • fatigue
  • fluid retention
  • headache
  • heartburn
  • increased appetite
  • restlessness
  • tremor
  • weakness
  • weight gain

Although most of the side effects listed below don't happen very often, they could lead to serious problems if you do not seek medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

  • agitation
  • bruising easily or excessive bleeding
  • changes in your menstrual period (for women)
  • enlarged breasts (in men)
  • increased thirst or hunger, or frequent urination
  • severe rash
  • signs of liver damage (abdominal pain, abdominal distention, fever, nausea or vomiting, yellowing of the skin or eyes)
  • slow, irregular, or fast heartbeat
  • symptoms of infection (cold or flu-like symptoms, fever, sore throat, as well as weakness of general feeling of unwellness)
  • twitching of your muscles or unusual facial or tongue movements

Stop taking the medication and seek immediate medical attention if any of the following occur:

  • painful erection or prolonged erection that lasts more than 4 hours
  • seizure
  • severe abdominal pain, fever, nausea, or vomiting
  • signs of an allergic reaction (shortness of breath or difficulty breathing; hives; swelling of the eyes, mouth, lips, or throat)
  • stiffness, fever, and difficulty moving

Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking this medication.

Are there any other precautions or warnings for this medication?

Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.

Body temperature: This medication, like other antipsychotic medications, can disrupt the body's ability to control body temperature. If you exercise vigorously, are exposed to extreme heat, are dehydrated, or are taking anticholinergic medications (e.g., benztropine, oxybutynin) you are more at risk. Contact your doctor as soon as possible if you feel very hot and are unable to cool down while taking this medication.

Drowsiness/reduced alertness: Olanzapine may impair the mental and physical abilities required for driving a car or operating machinery. Avoid drinking alcohol while taking this medication, as it may produce extreme drowsiness.

High blood sugar: Olanzapine, in rare instances, may cause an increase in blood sugar levels. Your doctor will monitor you if you have diabetes or are at risk of developing diabetes. If you experience weakness, increased thirst, increased urination, and increased appetite while taking this medication, contact your doctor.

Liver disease: Olanzapine can affect liver function and cause liver problems. If you have liver disorders you should have your liver function monitored closely by your doctor while taking olanzapine.

Low blood pressure: Olanzapine may cause low blood pressure, especially when moving from a lying or sitting position to a standing position. If you have heart disease, cerebrovascular disease, or conditions that increase the risk of developing low blood pressure (e.g., dehydration, treatment with blood pressure medications) you should be monitored by your doctor.

Neuroleptic malignant syndrome (NMS): Olanzapine, like other antipsychotic medications, can cause a potentially fatal syndrome known as neuroleptic malignant syndrome (NMS). If you notice the symptoms of NMS such as high fever, confusion or loss of consciousness, racing or irregular heartbeat, muscle stiffness, or sweating, get immediate medical attention.

Other medical conditions: If you have other medical conditions such as enlarged prostate glands, narrow-angle glaucoma, or paralytic ileus, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Prolonged erection: In rare cases, use of this medication by some men may cause them to develop priapism (a prolonged and painful erection). If you have an erection that lasts for more than 4 hours, contact your doctor.

Seizures: Olanzapine may increase the risk of seizures, especially if you have had seizures in the past. If you are at risk of seizures and take this medication, you should be closely monitored by your doctor.

Tardive dyskinesia (TD): TD, a syndrome consisting of potentially irreversible, involuntary, repetitive movements of the face and tongue muscles, may develop in people who take certain antipsychotic medications including olanzapine.

Although TD appears most commonly in seniors, especially women, it is impossible to predict who will develop TD. The risk of developing TD increases with higher doses and long-term treatment. If your experience muscle twitching or abnormal movements of the face or tongue, contact your doctor as soon as possible.

Weight gain: With long-term treatment, weight gain (averaging 5.4 kg) has occurred in people who take this medication. Weight gain tends to level off after 6 to 8 months of treatment.

Pregnancy: This medication should not be used during pregnancy unless the outweigh the risks. If you become pregnant while taking this medication, contact your doctor immediately.

Breast-feeding: This medication passes into breast milk. It is recommended that women taking this medication should not breast-feed.

Children: The safety and effectiveness of using this medication have not been established for children under the age of 18.

Seniors: There may be a higher risk of strokes, heart attacks, and deaths associated with the use of olanzapine by seniors with dementia. Seek medical attention immediately if you notice the signs and symptoms of a stroke (e.g., sudden weakness or numbness, speech problems, vision problems, dizziness, confusion, sudden severe headache) or a heart attack (e.g., discomfort or pain in the chest, back, neck, jaw, arms; sweating; shortness of breath; nausea; lightheadedness) or infection (e.g., pneumonia). Olanzapine should not be used in seniors with dementia.





What other drugs could interact with this medication?

There may be an interaction between olanzapine and any of the following:

  • alcohol
  • carbamazepine
  • ciprofloxacin
  • fluvoxamine
  • ketoconazole
  • levodopa and dopamine agonists
  • medications used to aid sleep
  • medications used to treat high blood pressure (e.g., atenolol, ramipril)
  • narcotic pain medications (e.g., codeine)
  • omeprazole
  • other antidepressant or antianxiety medications
  • smoking

If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:

  • stop taking one of the medications,
  • change one of the medications to another,
  • change how you are taking one or both of the medications, or
  • leave everything as is.

An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Medications other than those listed above may interact with this medication. Tell your doctor or prescriber about all prescription, over-the-counter (non-prescription), and herbal medications that you are taking. Also tell them about any supplements you take. Since caffeine, alcohol, the nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them.





 

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