• A painful erection of the penis that does not go away (priapism)
• Yellowing of the eyes or skin (jaundice), which may be signs of liver damage
• Any signs of an infection, since Thorazine can cause low levels of white blood cells, which can increase your risk of infections
• Dizziness or fainting when standing or sitting up suddenly
• An irregular heart rhythm (arrhythmia)
• Changes in walking patterns
• Breast changes, including breast enlargement or breast discharge
• Very severe constipation
• Worsening of psychotic symptoms
• Unusual body, facial, or tongue movements
• Muscle tension or contractions
• Feelings of internal restlessness or jitteriness
• Seizures
• Signs or symptoms of neuroleptic malignant syndrome, which can include:

 

• A high fever
• Stiff muscles
• Confusion
• Irregular pulse or blood pressure
• An increased heart rate (tachycardia)
• Sweating
• Irregular heart rhythms (arrhythmias)

 

• Signs of an allergic reaction, including unexplained rash, hives, itching, unexplained swelling, wheezing, or difficulty breathing or swallowing.
   

A Summary of Thorazine Side Effects