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 Desyrel:
Blurred vision; constipation; decreased sexual desire or ability; diarrhea; dizziness; drowsiness; dry mouth; headache; lightheadedness when sitting up or standing; muscle aches or pains; nausea; nervousness; stomach pain; stuffy nose; tiredness.
Seek medical attention right away if any of these SEVERE side effects occur when using Desyrel:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); black, tarry, or bloody stools; bloody or dark urine; chest pain; decreased coordination; fainting; fever, chills, or sore throat; hallucinations; irregular heartbeat; new or worsening agitation, anxiety, depression, panic attacks, aggressiveness, impulsiveness, irritability, hostility, exaggerated feeling of well-being, restlessness, trouble sleeping, or inability to sit still; prolonged, inappropriate, or painful erections; seizures; severe or persistent dizziness or tiredness; shortness of breath; speech problems; suicidal thoughts or actions; swelling of the hands, ankles, or feet; symptoms of low blood sodium levels (eg, confusion, persistent headache, trouble concentrating, memory problems, weakness, unsteadiness, sluggishness, personality changes); tremor; unusual bruising or bleeding; unusual weight changes; vomit that looks like coffee grounds; yellowing of the eyes or skin.
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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