While minor, some of these side effects may occur. They are as follows; Dizziness, lightheadedness, nausea, vomiting, loss of appetite, trouble sleeping, unusual dreams, or headache may occur. However if any of these persist or worsen, it’s best to speak with your doctor right away.
This medication may cause saliva, urine, or sweat to turn a dark color. This effect is harmless, but your clothes may be stained.
Tell your doctor right away if you have any serious side effects, including: new/worsening movements you can't control/spasms, greatly increased eye blinking/twitching, fainting, vision changes (such as blurred vision, double vision), eye pain, severe stomach/abdominal pain, black/tarry stools, vomit that looks like coffee grounds, mental/mood changes (such as agitation, hallucinations, depression, thoughts of suicide), signs of infection (such as sore throat that doesn't go away), easy bleeding/bruising, unusual tiredness, tingling of the hands/feet, unusual strong urges (such as increased gambling, increased sexual urges).
Get medical help right away if you have any very serious side effects, including: chest pain.
Abruptly stopping or reducing the dose of this medication may rarely cause a very serious condition called neuroleptic malignant syndrome (NMS). Get medical help right away if you have any of the following symptoms: fever, unusual muscle stiffness, severe confusion, sweating, fast/irregular heartbeat, rapid breathing.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.