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What is nadolol, and how does it work (mechanism of action)?
Nadolol is a member of a class of drugs called beta-adrenergic receptor blockers that is used for treating high blood pressure and heart pain (angina). Examples of other beta-adrenergic blockers include propanolol (Inderal, Inderal LA), atenolol (Tenormin), and timolol (Blocadren). Norepinephrine and epinephrine (adrenaline) are chemicals released within the body that attach to receptors on several types of cells, including nerves and some muscles, and changes the way the cells function, either stimulating the cells or suppressing them. Nadolol prevents norepinephrine and epinephrine from binding to beta receptors on nerves. By blocking the effect of norepinephrine and epinephrine, beta blockers reduce heart rate, reduce the force of the heart's contractions, and reduce blood pressure by relaxing the muscles surrounding the blood vessels.
Heart pain (angina) occurs when the workload of the heart requires more oxygen than the blood can supply. By slowing the heart rate and decreasing the force of contractions of the heart, nadolol reduces the demand of the heart's muscle for oxygen and thereby prevents angina. Beta blockers may cause difficulty breathing since they cause the muscles surrounding the air passages of the lung to contract, thus narrowing the air passages and making it more difficult for air to pass through . The FDA approved nadolol in 1979.
What brand names are available for nadolol?
Is nadolol available as a generic drug?
Do I need a prescription for nadolol?
What are the side effects of nadolol?
Nadolol is generally well tolerated. Side effects include abdominal cramps, diarrhea, constipation, fatigue, insomnia, nausea, depression, impotence, lightheadedness, slow heart rate, low blood pressure, cold extremities, sore throat, and shortness of breath or wheezing. Nadolol can increase breathing difficulties in patients with asthma, chronic bronchitis, or emphysema.
In patients with existing slow heart rates (bradycardias) and heart blocks (defects in the electrical conduction of the heart), nadolol can cause dangerously slow heart rates, and even shock. Nadolol reduces the force of heart muscle contraction and can increase symptoms of heart failure. In patients with coronary artery disease, abruptly stopping nadolol can suddenly worsen angina and occasionally precipitate heart attacks. If it is necessary to discontinue nadolol, its dose should be reduced gradually over several weeks.
What is the dosage for nadolol?
The recommended dose is 40-320 mg once daily. The maximum dose for treating angina is 240 mg daily and for hypertension is 320 mg daily. Nadolol may be administered with or without food. The dose for preventing migraines is 40 to 240 mg daily.
Which drugs or supplements interact with nadolol?
The blood pressure-lowering effects of nadolol are additive with other medications that lower blood pressure, and combinations of these other medications with nadolol often is used for treating persons with high blood pressure. When used in combination with diltiazem (Cardizem; Tiazac; Dilacor), verapamil (Calan, Isoptin, Verelan, Covera), amiodarone (Cordarone), or digoxin (Lanoxin), however, nadolol can cause complete block of the heart's electrical system, a life-threatening condition.
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Is nadolol safe to take if I'm pregnant or breastfeeding?
Safe use of nadolol during pregnancy has not been established.
What else should I know about nadolol?
What preparations of nadolol are available?
Tablets: 20, 40, 80 mg.
How should I keep nadolol stored?
Nadolol should be stored at room temperature, 15 C -30 C (59 F - 86 F).
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Nadolol (Corgard) is in the drug class of beta blockers and is prescribed for the treatment of angina (heart pain, chest pain), high blood pressure, abnormal heart rhythms, tremor, and the prevention of headaches and anxiety. Side effects, drug interactions, warnings and precautions, and safety during pregnancy information should be reviewed prior to taking this medication.
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Related Disease Conditions
High Blood Pressure (Hypertension)
High blood pressure (hypertension) is a disease in which pressure within the arteries of the body is elevated. About 75 million people in the US have hypertension (1 in 3 adults), and only half of them are able to manage it. Many people do not know that they have high blood pressure because it often has no has no warning signs or symptoms. Systolic and diastolic are the two readings in which blood pressure is measured. The American College of Cardiology released new guidelines for high blood pressure in 2017. The guidelines now state that blood normal blood pressure is 120/80 mmHg. If either one of those numbers is higher, you have high blood pressure. The American Academy of Cardiology defines high blood pressure slightly differently. The AAC considers 130/80 mm Hg. or greater (either number) stage 1 hypertension. Stage 2 hypertension is considered 140/90 mm Hg. or greater. If you have high blood pressure you are at risk of developing life threatening diseases like stroke and heart attack.REFERENCE: CDC. High Blood Pressure. Updated: Nov 13, 2017.
Raynaud's phenomenon is characterized by a pale-blue-red sequence of color changes of the digits, most commonly after exposure to cold. Occurring as a result of spasm of blood vessels, the cause is unknown. Symptoms of Raynaud's phenomenon depend on the severity, frequency, and duration of the blood vessel spasm. Treatments include protection of the digits, medications, and avoiding emotional stresses, smoking, cold temperature, and tools that vibrate the hands.
High Blood Pressure Treatment (Natural Home Remedies, Diet, Medications)
High blood pressure (hypertension) means high pressure (tension) in the arteries. Treatment for high blood pressure include lifestyle modifications (alcohol, smoking, coffee, salt, diet, exercise), drugs and medications such as ACE inhibitors, angiotensin receptor blockers, beta blockers, diuretics, calcium channel blockers (CCBs), alpha blockers, clonidine, minoxidil, and Exforge.
Tremor is the involuntary movements of one or more parts of the body. Causes of tremor include neurological disorders, neurodegenerative diseases, drugs, mercury poisoning, overactive thyroid and liver failure. There are several types of tremor. Treatment depends upon the type of tremor and availability of medications for the condition.
Migraine headache is a type of headache associated with a sensitivity to light, smells, or sounds, eye pain, severe pounding on one side of the head, and sometimes nausea and vomiting. The exact cause of migraine headaches is not known. Triggers for migraine headaches include certain foods, stress, hormonal changes, strong stimuli (loud noises), and oversleeping. Treatment guidelines for migraines include medicine, pain management, diet changes, avoiding foods that trigger migraines, staying hydrated, getting adequate sleep, and exercising regularly. Prevention of migraine triggers include getting regular exercise, drinking water daily, reducing stress, and avoiding trigger foods.
Chest pain is a common complaint by a patient in the ER. Causes of chest pain include broken or bruised ribs, pleurisy, pneumothorax, shingles, pneumonia, pulmonary embolism, angina, heart attack, costochondritis, pericarditis, aorta or aortic dissection, and reflux esophagitis. Diagnosis and treatment of chest pain depends upon the cause and clinical presentation of the patient's chest pain.
Stress occurs when forces from the outside world impinge on the individual. Stress is a normal part of life. However, over-stress, can be harmful. There is now speculation, as well as some evidence, that points to the abnormal stress responses as being involved in causing various diseases or conditions.
Angina is chest pain due to inadequate blood supply to the heart. Angina symptoms may include chest tightness, burning, squeezing, and aching. Coronary artery disease is the main cause of angina but there are other causes. Angina is diagnosed by taking the patient's medical history and performing tests such as an electrocardiogram (EKG), blood test, stress test, echocardiogram, cardiac CT scan, and heart catheterization. Treatment of angina usually includes lifestyle modification, medication, and sometimes, surgery. The risk of angina can be reduced by following a heart healthy lifestyle.
Heart Attack (Myocardial Infarction)
A heart attack happens when a blood clot completely obstructs a coronary artery supplying blood to the heart muscle. A heart attack can cause chest pain, heart failure, and electrical instability of the heart.
Anxiety is a feeling of apprehension and fear characterized by symptoms such as trouble concentrating, headaches, sleep problems, and irritability. Anxiety disorders are serious medical illnesses that affect approximately 19 million American adults. Treatment for anxiety may incorporate medications and psychotherapy.
Atrial Fibrillation (AFib) Treatment Drugs
Atrial fibrillation (AFib) is a heart rhythm disorder that causes irregular and often rapid heartbeat. The medications to treat AFib include beta-blockers, blood thinners, and heart rhythm drugs. Atrial fibrillation drugs can cause serious side effects like seizures, vision changes, shortness of breath, fainting, other abnormal heart rhythms, excessive bleeding while coughing or vomiting, blood in the stool, and bleeding into the brain.
Arrhythmias (Heart Rhythm Disorders)
Heart rhythm disorders vary from minor palpitations, premature atrial contractions (PACs), premature ventricular contractions (PVCs), sinus tachycardia, and sinus bradycardia, to abnormal heart rhythms such as tachycardia, ventricular fibrillation, ventricular flutter, atrial fibrillation, atrial flutter, paroxysmal supraventricular tachycardia (PSVT), Wolf-Parkinson-White syndrome, brachycardia, or heart blocks. Treatment is dependent upon the type of heart rhythm disorder.
Febrile seizures, or convulsions caused by fever, can be frightening in small children or infants. However, in general, febrile seizures are harmless. Febrile seizure is not epilepsy. It is estimated that one in every 25 children will have at least one febrile seizure. It is important to know what to do to help your child if he/she has a febrile seizure. Some of the features of a febrile seizure include: losing consciousness, shaking, moving limbs on both sides of the body, lasts 1-2 minutes. Less commonly, a febrile seizure may only affect one side of the body.
Treatment & Diagnosis
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Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
FDA Prescribing Information