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Class II Drugs Contributions by ColleenO

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Possible side effects of class II drugs (beta blockers) for arrhythmias include:

  • Breathing problems (wheezing)
  • Heart failure
  • Fatigue
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Class II drugs for arrhythmia treatment are beta blockers. There are many beta-blockers, but generally these two are the ones used to treat arrhythmias:

  • Propranolol (Inderal)
  • Metoprolol (Lopressor)

All beta-blockers are used primarily for blood pressure control or to treat angina. Side effects are less wide ranging than Class I drugs.

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Like many other drugs used to treat arrhythmias, class II drugs (beta blockers) help by slowing the electrical activity in the heart. While their overall effect may be similar to other drugs, these beta blockers work differently than drugs in classes I, III and IV. Beta blockers are also used to treat high blood pressure and angina.

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