Dizziness, nausea, vomiting, dry mouth, trouble sleeping, unusual dreams, or headache may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
This medication may cause urine, sweat, or saliva to turn red, brown, or black. This effect is harmless, but your clothes may become stained.
Some people taking this medication have fallen asleep suddenly during their usual daily activities (such as talking on the phone, driving). In some cases, sleep occurred without any feelings of drowsiness beforehand. This sleep effect may occur anytime during treatment with this medication even if you have used this medication for a long time. If you experience increased sleepiness or fall asleep during the day, do not drive or take part in other possibly dangerous activities until you have discussed this effect with your doctor. Your risk of this sleep effect is increased by using alcohol or other medications that can make you drowsy. See also Precautions section.
Tell your doctor right away if you have any serious side effects, including: fainting, mental/mood changes (such as agitation, confusion, depression, hallucinations, thoughts of suicide), unusual strong urges (such as increased gambling, increased sexual urges), new/worsening movements you can't control/spasms, greatly increased eye blinking/twitching, easy bruising/bleeding, signs of infection (such as fever, persistent sore throat), unusual tiredness, tingling of the hands/feet, vision changes (such as blurred/double/decreased vision), eye pain, severe stomach/abdominal pain, vomit that looks like coffee grounds, black/tarry stools, problems with urination.
Get medical help right away if you have any very serious side effects, including: chest pain.
Suddenly 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.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.