FANAPT Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Severe expression i

  • altered interest in having sexual intercourse
  • aggressive behavior
  • extrapyramidal disease, a type of movement disorder
  • orthostatic hypotension, a form of low blood pressure
  • dizziness
  • fast heartbeat

If experienced, these tend to have a Less Severe expression i

  • pink eye
  • stuffy nose
  • dry mouth
  • muscle spasm
  • muscle pain
  • drowsiness
  • low energy
  • weight gain
  • nausea
  • involuntary leakage of urine

INFREQUENT side effects

If experienced, these tend to have a Severe expression i

  • blurred vision
  • low blood pressure
  • breastmilk production not associated with childbirth or nursing
  • absence of menstrual periods
  • muscle tremors
  • a feeling of restlessness with inability to sit still
  • a skin rash
  • trouble breathing

If experienced, these tend to have a Less Severe expression i

  • a high prolactin level
  • excessive fat in the blood
  • confusion
  • throat irritation
  • the inability to have an erection
  • joint pain
  • diarrhea
  • nervousness
  • intense abdominal pain

RARE side effects

If experienced, these tend to have a Severe expression i

  • diabetes
  • very low levels of granulocytes, a type of white blood cell
  • low levels of white blood cells
  • low levels of a type of white blood cell called neutrophils
  • manic behavior
  • mood changes
  • delusions
  • feelings of hostility
  • a type of movement disorder called parkinsonism
  • tardive dyskinesia, a disorder characterized by involuntary movements of the face, mouth and tongue
  • neuroleptic malignant syndrome, a reaction characterized by fever, muscle rigidity and confusion
  • prolonged QT interval on EKG
  • chronic heart failure
  • a stroke
  • cerebral ischemia, a lack of blood supply to the brain
  • a feeling of throat tightness
  • gallstones
  • priapism, a prolonged erection of the penis
  • abnormally long or heavy periods
  • memory loss
  • mental status changes
  • fainting
  • fever
  • visible water retention
  • high blood sugar
  • a significant type of allergic reaction called anaphylaxis
  • a type of allergic reaction called angioedema
  • problems with food passing through the esophagus

If experienced, these tend to have a Less Severe expression i

  • anemia
  • clouding of the lens of the eye called cataracts
  • an increased amount of blood in the lining of the eye called conjunctival hyperemia
  • accumulation of fluid in the tissues of the eyelid
  • dry eye
  • nystagmus, a condition with involuntary eye movements
  • ringing in the ears
  • a stuffy and runny nose
  • excessive saliva production
  • stomatitis, a condition with painful swelling and sores inside the mouth
  • a type of stomach irritation called gastritis
  • a problem with menstrual periods
  • sensation of spinning or whirling
  • weight loss
  • changes in appetite
  • nosebleed
  • a feeling of pins and needles on skin
  • abnormal muscle movements

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Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.

CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.