Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).
High doses or long-term use of fluphenazine can cause a serious movement disorder that may not be reversible. The longer you use fluphenazine, the more likely you are to develop this disorder, especially if you are an older adult.
Call your doctor at once if you have:
uncontrolled muscle movements in your face (chewing, lip smacking, frowning, tongue movement, blinking or eye movement);
extreme drowsiness or light-headed feeling (like you might pass out);
strange dreams, or if you feel restless or excited;
blurred vision, tunnel vision, eye pain, or seeing halos around lights;
painful or difficult urination;
severe constipation, stomach pain, bloating;
jaundice (yellowing of the skin or eyes);
a seizure; or
low white blood cell counts--fever, chills, mouth sores, skin sores, sore throat, cough, trouble breathing, feeling light-headed.
Common side effects may include:
drowsiness, headache, blurred vision;
problems with balance or muscle movement;
nausea, loss of appetite, constipation;
swelling, weight changes;
stuffy nose, dry mouth, or drooling;
increased sweating or urination;
breast swelling or tenderness; or
impotence, trouble having an orgasm.
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.
 Fluphenazine side effects (more detail)
