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Generic Name: propranolol (proe-PRAN-oh-lol)
Brand Name: Inderal

Do not suddenly stop taking Inderal. Sharp chest pain, irregular heartbeat, and, sometimes, heart attack may occur if you suddenly stop Inderal. The risk may be greater if you have certain types of heart disease. Your doctor should slowly lower your dose over several weeks if you need to stop taking Inderal. This should be done even if you only take Inderal for high blood pressure. Heart disease is common and you may not know you have it. Limit physical activity while you are lowering your dose. If new or worsened chest pain or other heart problems occur, contact your doctor right away. You may need to start taking Inderal again.


Inderal is used for:

Treating high blood pressure or atrial fibrillation. It is used in patients with angina to decrease angina frequency and increase exercise tolerance. It is used to decrease the risk of heart death in certain patients who have survived a heart attack. It is used to manage certain types of tremors, a heart condition called hypertrophic subaortic stenosis, or certain symptoms of pheochromocytoma (an adrenal tumor). It is used to prevent migraine headaches. It may also be used for other conditions as determined by your doctor.

Inderal is a beta-blocker. It works by slowing down the heart and decreasing the amount of blood it pumps out. This helps to decrease blood pressure, helps the heart pump more efficiently, and reduces the workload on the heart. Exactly how Inderal works to treat migraines or tremors is not known.

Do NOT use Inderal if:

  • you are allergic to any ingredient in Inderal
  • you have moderate to severe heart block, sick sinus syndrome, or a very slow heartbeat and you do not have a permanent pacemaker
  • you have uncontrolled heart failure, shock caused by serious heart problems, or very low blood pressure after a heart attack
  • you have asthma
  • the patient is a child with diabetes or heart failure
  • you are taking mibefradil

Contact your doctor or health care provider right away if any of these apply to you.

Before using Inderal:

Some medical conditions may interact with Inderal. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances, or are taking medicine for allergies
  • if you have a history of other heart problems (eg, angina, congestive heart failure, slow heartbeat)
  • if you have a history of liver or kidney problems, blood vessel disease, lung or breathing problems (eg, chronic bronchitis, emphysema, chronic obstructive pulmonary disease [COPD]), diabetes, low blood sugar, overactive thyroid, or glaucoma
  • if you have Wolff-Parkinson-White syndrome, Down syndrome, Raynaud syndrome, or an adrenal gland tumor (pheochromocytoma)
  • if you smoke or drink alcohol

Some MEDICINES MAY INTERACT with Inderal. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Mibefradil because the risk of serious heart side effects may be increased
  • Many prescription and nonprescription medicines (eg, used for infections, inflammation, aches and pains, high blood pressure, heart problems, irregular heartbeat, diabetes, prostate problems, blood thinning, thyroid problems, depression, mental or mood problems, immune system suppression, allergic reactions, asthma, high cholesterol, seizures, local anesthesia), multivitamin products, and herbal or dietary supplements (eg, herbal teas, coenzyme Q10, garlic, ginseng, ginkgo, St. John's wort) may interact with Inderal, increasing the risk of side effects

This may not be a complete list of all interactions that may occur. Ask your health care provider if Inderal may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Inderal:

Use Inderal as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Take Inderal by mouth. Talk with your doctor about how you should take it with regard to food.
  • If you are taking an antacid with aluminum in it, take it at least 2 hours after you take Inderal.
  • Take Inderal on a regular schedule to get the most benefit from it. Taking Inderal at the same time each day will help you remember to take it.
  • Continue to take Inderal even if you feel well. Do not miss any doses.
  • Do not suddenly stop taking Inderal. You may have an increased risk of side effects. If you need to stop Inderal or add a new medicine, your doctor will gradually lower your dose.
  • If you miss a dose of Inderal, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Inderal.

Important safety information:

  • Inderal may cause drowsiness, dizziness, lightheadedness, or vision changes. These effects may be worse if you take it with alcohol or certain medicines. Use Inderal with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • Check with your doctor before you drink alcohol while you are taking Inderal; it may increase the risk of Inderal's side effects.
  • Do NOT take more than the recommended dose without checking with your doctor.
  • Patients who take medicine for high blood pressure often feel tired or run down for a few weeks after starting treatment. Be sure to take your medicine even if you may not feel "normal." Tell your doctor if you develop any new symptoms.
  • Tell your doctor or dentist that you take Inderal before you receive any medical or dental care, emergency care, or surgery.
  • If you have a history of any severe allergic reaction, talk with your doctor. You may be at risk of an even more severe allergic reaction if you come into contact with the substance that caused your allergy. Some medicines used to treat severe allergies may also not work as well while you are using Inderal.
  • Inderal may lower your blood sugar levels. This is most likely to happen in infants and children, or in patients who have diabetes or kidney problems. It may also occur after prolonged physical activity or during fasting. Low blood sugar may make you anxious, sweaty, weak, dizzy, drowsy, or faint. It may also make your heart beat faster; make your vision change; give you a headache, chills, or tremors; or make you more hungry. It is a good idea to carry a reliable source of glucose (eg, tablets or gel) to treat low blood sugar. If this is not available, you should eat or drink a quick source of sugar like table sugar, honey, candy, orange juice, or non-diet soda. This will raise your blood sugar level quickly. Tell your doctor right away if this happens.
  • Diabetes patients - Inderal may hide signs of low blood sugar, such as a rapid heartbeat. Be sure to watch for other signs of low blood sugar. Check blood sugar levels closely. Ask your doctor before you change the dose of your diabetes medicine.
  • Inderal may interfere with certain lab tests, including glaucoma screening and dobutamine stress echocardiography. Be sure your doctor and lab personnel know you are taking Inderal.
  • Lab tests, including blood pressure and heart function, may be performed while you use Inderal. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
  • Use Inderal with caution in the ELDERLY; they may be more sensitive to its effects.
  • Caution is advised when using Inderal in CHILDREN; they may be more sensitive to its effects, especially low blood sugar levels or shortness of breath.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Inderal while you are pregnant. Inderal is found in breast milk. If you are or will be breast-feeding while you use Inderal, check with your doctor. Discuss any possible risks to your baby.

If you stop taking Inderal suddenly, you may have WITHDRAWAL symptoms. These may include worsening chest pain along with possible heart attack.

Possible side effects of Inderal:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Constipation; diarrhea; dizziness; drowsiness; fatigue; lightheadedness; nausea; stomach upset or cramping; trouble sleeping; vomiting; weakness.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain; disorientation; fever with aching and sore throat; hallucinations; memory loss; mental or mood changes; numbness or tingling of the hands; persistent or severe vision changes; red, swollen, blistered, or peeling skin; severe dizziness; shortness of breath or wheezing; sudden, unusual weight gain; swelling of the hands, ankles, or feet; unusual bruising; unusually slow heartbeat; very cold or blue fingers or toes.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include severe dizziness; shortness of breath; swelling of the hands, ankles, or feet; trouble breathing; very slow heart rate; wheezing.

Proper storage of Inderal:

Store Inderal between 68 and 77 degrees F (20 and 25 degrees C). Brief storage at temperatures between 59 and 86 degrees F (15 and 30 degrees C) is permitted. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Inderal out of the reach of children and away from pets.

General information:

  • If you have any questions about Inderal, please talk with your doctor, pharmacist, or other health care provider.
  • Inderal is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Inderal or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Inderal. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Inderal. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Inderal.

Issue Date: September 3, 2014
Database Edition 14.3.1.003
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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