Generic name: Nadolol.

Corgard is a beta-blocker. It slows the heart rate and reduces high blood pressure. 

Quick Facts About Corgard


Used to treat angina (chest pain) and to reduce high blood pressure.

Corgard Dosage

May take with or without food. Take as prescribed, even if symptoms disappear. Must take regularly for it to be effective with high blood pressure; may take a few weeks before you observe full effect of medication. Medication should not be stopped abruptly, may increase chest pain or cause a heart attack.

  • Usual adult dose: for angina — initially, 40 milligrams once per day. Long-term dose is 40 to 80 milligrams, once per day, up to 160 to 240 milligrams once per day. For high blood pressure — initially, 40 milligrams once per day. Long-term dose is 40 to 80 milligrams once per day, up to 240 to 320 milligrams once per day. Seniors — dose will reflect individual needs.
  • Usual child dose: not generally prescribed for children.
  • Missed dose: take as soon as possible, unless within 8 hours of the next dose. In that case, do not take missed dose; go back to regular schedule. Do not double doses.

Corgard Side Effects

Overdose symptoms:

difficulty in breathing, heart failure, low blood pressure, slow heartbeat. If you suspect an overdose, immediately seek medical attention.

More common side effects: behavior change, change in heartbeat, dizziness or light-headedness, mild drowsiness, slow heartbeat, weakness or tiredness.

Less common or rare side Corgard side effects: abdominal discomfort, asthma-like symptoms, bloating, confusion, constipation, cough, decreased sex drive, diarrhea, dry eyes, dry mouth, dry skin, facial swelling, gas, headache, heart failure, impotence, indigestion, itching, loss of appetite, low blood pressure, nasal stuffiness, nausea, rash, ringing in ears, slurred speech, vision changes, vomiting, weight gain.


Inform your doctor before combining Corgard with:

antidiabetic medications including Insulin and oral medications such as Micronase; certain blood pressure medications such as Diupres and Ser-Ap-Es; Epinephrine (EpiPen).

No known food/other substance interactions.

Special Cautions

If pregnant or planning to become pregnant, inform your doctor immediately. Appears in breast milk; could affect a nursing baby.

Dose will reflect individual needs in seniors.

Not generally prescribed for children.

  • May impair your ability to drive a car or operate mjp machinery. Do not take part in any activity that requires alertness.
  • Should not take if you have: slow heartbeat, heartbeat irregularity, cardiogenic shock, or active heart failure.
  • Use with caution if you have: asthma, chronic bronchitis, emphysema, seasonal allergies or other bronchial conditions, kidney disease, or liver disease.
  • Monitor pulse rate, may have slowed rate while taking Corgard.
  • If diabetic, be aware that Corgard can mask the symptoms of low blood sugar, or alter blood sugar levels.
  • Notify your doctor or dentist that you are taking Corgard before surgery or in an emergency situation.

Note: provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Corgard side effects, please contact your healthcare provider.