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What are the side effects of nalbuphine HCl (hydrochloride)?

The following side effects associated with using nalbuphine hydrochloride (HCl) require prompt attention from your doctor: weak or shallow breathing; fast or slow heart rate; cold, clammy skin; confusion, hallucinations, or unusual thoughts or behavior; severe weakness or dizziness; or feeling that you might pass out or actually fainting. Other side effects are generally minor and only require medical attention if they persist or disrupt your daily life.

These include lightheadedness or drowsiness; upset stomach, nausea, stomach cramps, or vomiting; dry mouth or bitter taste; headache; itchy, burning skin or warmth, tingling, or redness under your skin; confusion or hallucinations; a feeling of heaviness; unusual weakness; sweating; and trouble with speech or vision. If you experience an allergic reaction characterized by difficulty breathing, facial swelling, itchy rash, or hives, seek immediate emergency care.

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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.