Hey there I been placed on the fentanyl patch for pain control due various reasonings. Anyways one thing I noticed most during night times I get major headaches and been actually blaming it on the fentanyl.. Is fentanyl known to cause headaches as a side effect?
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Anxiety; confusion; constipation; difficulty walking; dizziness; drowsiness; dry mouth; headache; indigestion; itching; nausea; vomiting.