• An irregular heart rhythm (arrhythmia)

• Low blood pressure (hypotension)

• Very severe constipation

• High blood sugar (hyperglycemia) or low blood sugar (hypoglycemia)

• Yellowing of the whites of the eyes or skin (jaundice)

 

• Breast changes, such as breast enlargement or breast discharge

• A painful erection of the penis that does not go away (known medically as priapism)

• Seizures

• Worsening of psychotic symptoms

• "Extrapyramidal symptoms," such as:

• Unusual body, facial, or tongue movements
• Muscle tension or contractions
• Feelings of internal restlessness or jitteriness

• Signs or symptoms of neuroleptic malignant syndrome, which can include:

• A high fever
• Stiff muscles
• Confusion
• An irregular pulse or blood pressure
• An increased heart rate (tachycardia)
• Sweating
• An irregular heart rhythm (arrhythmia)

• Signs of an allergic reaction, including:

• An unexplained rash
• Hives
• Itching
• Unexplained swelling
• Wheezing
• Difficulty breathing or swallowing.