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While taking this medication, you might experience mild side effects like dizziness, lightheadedness, nausea, vomiting, loss of appetite, trouble sleeping, unusual dreams, or headaches. These are typically not serious, but if they persist or worsen, it's important to discuss them with a healthcare professional. You may also notice that your saliva, urine, or sweat becomes darker; this is harmless, though it could stain clothing. To help prevent dizziness or lightheadedness, try rising slowly from a sitting or lying position.

Some individuals may rarely fall asleep suddenly during daily activities, possibly without prior drowsiness. If you experience this, avoid driving or engaging in potentially hazardous activities and consult a healthcare professional. Alcohol or medications that cause drowsiness can increase this risk.

Serious side effects that require immediate attention include uncontrolled movements, increased eye blinking, vision changes, severe stomach pain, black stools, vomit resembling coffee grounds, mental changes, signs of infection, unusual bleeding, and strong urges like increased gambling or sexual desires. Seek urgent medical help for chest pain or fainting, as these may indicate severe side effects.

Stopping this medication abruptly can occasionally lead to neuroleptic malignant syndrome (NMS), a serious condition characterized by fever, muscle stiffness, confusion, sweating, and an irregular heartbeat. Additionally, although rare, severe allergic reactions can occur. If you notice symptoms such as rash, swelling, severe dizziness, or difficulty breathing, seek immediate medical attention. This summary does not cover all possible side effects, so for any unlisted symptoms, contact a healthcare provider.