All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Asendin:
Nausea; drowsiness; weakness or tiredness; nightmares; dry mouth; skin more sensitive to sunlight than usual; changes in appetite or weight; constipation; difficulty urinating; frequent urination; blurred vision; excessive sweating.
Seek medical attention right away if any of these SEVERE side effects occur when using Asendin:
Muscle stiffness; confusion; fast or irregular heartbeat; slow or difficult speech; shuffling walk; uncontrollable shaking or moving of a part of the body; fever; rash.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.
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