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What are the possible side effects of orphenadrine?

The most common side effects of orphenadrine include: drowsiness, headaches, upset stomach, nausea and vomiting, constipation, dizziness or weakness, dry mouth or blurry vision. Talk to your doctor if any of these side effects persists.

If any signs of a serious allergic reaction appear, including swelling in the mouth, face or tongue; tightness in the chest; difficulty breathing or swallowing; or hives or a rash, get medical help right away or call 911. People who are allergic to sulfites may have reactions with orphenadrine.   

Other severe side effects of orphenadrine may include: injection-site pain, swelling or redness. Severe side effects may also include irregular or racing heartbeat, agitation, confusion, hallucinations, fever, chills, sore throat, extreme exhaustion or weakness, odd bruising or bleeding, tremors, changes in vision and difficulty urinating or an inability to urinate. Seek medical attention right away if you experience any of these side effects or any other adverse symptoms.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.