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Neuromuscular blockers

Pain Relief

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What are neuromuscular blocking drugs?

Neuromuscular blocking drugs stop the muscles from working for a short period of time. They relax the skeletal muscles during surgery or other procedures that call for general anesthesia. They also can be used when a patient must have a tube put into the throat to help with breathing (intubation). All of the drugs are given as a clear liquid into the vein (IV).

  • Atracurium (Tracrium®)
  • Mivacurium (Mivacron®)
  • Pancuronium (Pavulon®)
  • Rocuronium (Zemuron®)
  • Succinylcholine (Anectine®)
  • Vecuronium (Norcuron®)
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Possible side effects

  • Flushing, rash
  • Low blood pressure
  • Increased heart rate
  • Feeling dizzy
  • Muscle spasms
  • Burning and pain at injection site
  • Hiccups
  • Trouble breathing
  • Muscle weakness

    These are the most common side effects, but there may be others. Please report all side effects to the doctor or nurse. A doctor will carefully supervise the giving of these drugs.

Symptoms of an allergic reaction include: rash, hives, itching, chills, fever, headache, muscle ache, shortness of breath, coughing, tightness in the throat, swelling of the face or neck.

Not all patients who take neuromuscular blockers will experience these side effects. Common side effects are bolded, but there may be others. Please report all suspected side effects to your doctor or pharmacist.

Find more information on side effects.

Be sure to discuss all questions and instructions with your doctor or pharmacist. 

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Always check the medication label. Many medicines look the same. Do not take any new medicine, including over-the counter medicines or supplements, without checking with your doctor or pharmacist. Talk to your doctor or pharmacist about what to do in the case of a missed dose, allergic reaction, or medical emergency. 

This information is not intended to be a complete guide and is not a substitute for talking with your provider. Medicine names, appearance, formulas, or availability may vary by clinic location. Always follow the instructions given by your care team.

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