All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Fanapt:
Diarrhea; dizziness; drowsiness; dry mouth; fatigue; nausea; stuffy nose; weight gain.
Seek medical attention right away if any of these SEVERE side effects occur when using Fanapt:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); abnormal thoughts; behavior changes; chest pain; confusion; decreased sexual ability; decreased urination; enlarged breasts; fainting; fast or irregular heartbeat; fever, chills, or persistent sore throat; increased saliva production or drooling; increased sweating; mental or mood changes; missed menstrual period; muscle pain, weakness, or stiffness; nipple discharge; prolonged, painful erection; seizures; severe or prolonged dizziness or headache; shortness of breath; suicidal thoughts or attempts; symptoms of high blood sugar (eg, increased thirst, hunger, or urination; unusual weakness); tremor; trouble concentrating, speaking, or swallowing; trouble sitting still; trouble walking or standing; uncontrolled muscle movements (eg, arm or leg movements, twitching of the face or tongue, jerking or twisting); unusual eye movements.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.
Individuals often respond to medications differently, and ratings can therefore be quite varied. Our objective is to provide a general rating for drugs used and prescribed from a large pool of participants, thus giving other future patients and mental health professionals insight into a drug's potential effectiveness. Your participation is greatly valued and appreciated. Thank you.