Blood Pressure Home > Corgard Warnings and Precautions

There are many precautions and warnings with Corgard to be aware of. For example, there are certain other medications that can interact with Corgard. Also, this drug may not be safe for pregnant or breastfeeding women. Other warnings relate to the safety of taking Corgard if you have heart failure and the risk of serious side effects in some people taking the drug.

What Should I Tell My Healthcare Provider Before Taking Corgard?

You should talk with your healthcare provider prior to taking Corgard® (nadolol) if you have:
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
Make sure to tell your healthcare provider about all other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.

Specific Corgard Warnings and Precautions

Some warnings and precautions to be aware of prior to taking Corgard include the following:
  • As with all beta blockers, you should not abruptly stop taking Corgard, as serious problems (including heart attacks) may result. Your healthcare provider will advise you about how to safely stop taking this medication. It is usually recommended to slowly reduce the dose over a period of one to two weeks, with careful monitoring, and to minimize physical activity during this time. Let your healthcare provider know if you develop chest pain or any other problems while stopping Corgard.
  • Beta blockers can worsen breathing problems like asthma or COPD. If you have breathing problems, check with your healthcare provider before taking Corgard. In general, it is not recommended for people with such problems to take Corgard.
  • Like all beta blockers, Corgard can worsen heart failure in some situations. However, beta blockers are also useful for the treatment of heart failure. If you have heart failure, your healthcare provider may need to monitor you very closely while you take Corgard. Let your healthcare provider know immediately if your heart failure symptoms seem to worsen.
  • If you will be having surgery, make sure your surgeon and anesthesiologist know you take Corgard, as it may affect the choice of medications used during the surgery.
  • Beta blockers can mask some of the symptoms of low blood sugar (hypoglycemia), particularly the "racing heart" feeling. This can cause serious problems for people with diabetes, who need to be able to sense that they have low blood sugar (in order to correct it before it becomes life-threatening).
  • Beta blockers can mask some of the symptoms of an overactive thyroid (hyperthyroidism). Stopping Corgard suddenly could cause symptoms of a "thyroid storm" (a sudden and severe worsening of hyperthyroidism symptoms).
  • Corgard can potentially interact with many other medications (see Corgard Interactions).
  • The kidneys help remove Corgard from the body. If you have kidney disease, your healthcare provider may need to monitor your response to Corgard more closely (and a lower Corgard dosage may be recommended).
  • If you have an anaphylactic allergy (the type that affects the entire body and often interferes with breathing), Corgard may make you more sensitive to the allergen and may make the usual treatments (such as epinephrine or an EpiPen®) less effective.
  • Corgard is considered a pregnancy Category C medication. This means that it may not be safe for use during pregnancy, although the full risks are not currently known (see Nadolol and Pregnancy).
  • Corgard passes through breast milk in humans. Therefore, if you are breastfeeding or plan to start breastfeeding, discuss this with your healthcare provider prior to taking the drug (see Nadolol and Breastfeeding).
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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