Get emergency medical help if you have signs of an allergic reaction to Invega: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop taking Invega and call your doctor at once if you have any of these signs of a serious movement disorder:
tremors or shaking in your arms or legs;
uncontrolled muscle movements in your face (chewing, lip smacking, frowning, tongue movement, blinking or eye movement); or
any new or unusual muscle movements you cannot control.
Call your doctor at once if you have:
fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness (like you might pass out);
breast swelling (in women or men), nipple discharge;
changes in menstrual periods;
impotence, penis erection that is painful or lasts 4 hours or longer;
weight gain;
low white blood cell counts - fever, chills, mouth sores, skin sores, sore throat, cough, trouble breathing;
high blood sugar - increased thirst, increased urination, hunger, fruity breath odor; or
severe nervous system reaction - very stiff (rigid) muscles, high fever, fast or pounding heartbeats, fainting.
Common Invega side effects may include:
drowsiness;
anxiety;
muscle stiffness, tremors or shaking;
uncontrolled muscle movements, trouble with walking, balance, or speech;
weight gain;
upset stomach, constipation;
fast heart rate; or
stuffy nose, sore throat.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Invega side effects (more detail)
