Agitation; blurred vision; constipation; dizziness or lightheadedness when sitting up or standing; drowsiness; dry mouth, nose, or throat; nausea; nervousness; stomach upset.

Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); anxiety; behavior changes; chest pain; confusion; disorientation; exaggerated sense of well-being; fast, slow, or irregular heartbeat; flushing; hallucinations; loss of coordination; memory loss; mood or mental changes; seizures; trouble urinating.