Generic Name: propranolol (pro PRAN oh lol)
Brand Names: Inderal, Inderal LA, InnoPran XL

What is Inderal?

Inderal (propranolol) is a beta-blocker. Beta-blockers affect the heart and circulation (blood flow through arteries and veins).

Inderal is used to treat tremors, angina (chest pain), hypertension (high blood pressure), heart rhythm disorders, and other heart or circulatory conditions. It is also used to treat or prevent heart attack, and to reduce the severity and frequency of migraine headaches.

Inderal may also be used for purposes not listed in this medication guide.

Important information

You should not use Inderal if you are allergic to propranolol, if you have asthma, a slow heart rate, or a serious heart condition such as "sick sinus syndrome" or "AV block" (unless you have a pacemaker). If you need surgery, tell the surgeon ahead of time that you are using Inderal. You may need to stop using the medicine for a short time. Do not skip doses or stop using Inderal without first talking to your doctor. You may need to use less and less before you stop the medication completely.

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Avoid drinking alcohol. It may increase your blood levels of propranolol.

Inderal is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.

If you are being treated for high blood pressure, keep using Inderal even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.

Before taking this medicine

You should not use Inderal if you are allergic to propranolol, if you have asthma, a slow heart rate, or a serious heart condition such as "sick sinus syndrome" or "AV block" (unless you have a pacemaker).

To make sure you can safely take Inderal, tell your doctor if you have any of these other conditions:

  • a muscle disorder;

  • bronchitis, emphysema, or other breathing disorders;

  • diabetes (propranolol can make it harder for you to tell when you have low blood sugar);

  • low blood pressure;

  • congestive heart failure;

  • depression;

  • liver or kidney disease;

  • a thyroid disorder;

  • pheochromocytoma; or

  • problems with circulation (such as Raynaud's syndrome).

FDA pregnancy category C. It is not known whether Inderal will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication. Propranolol can pass into breast milk and may harm a nursing baby. Do not use Inderal without telling your doctor if you are breast-feeding a baby.

See also: Pregnancy and breastfeeding warnings (in more detail)

How should I take Inderal?

Take Inderal exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

You may take Inderal with or without food, but take it the same way each time.

Take the medicine at the same time each day.

Do not crush, chew, break, or open an extended-release Inderal capsule. Swallow it whole. Breaking or opening the pill may cause too much of the drug to be released at one time.

Do not skip doses or stop using Inderal without first talking to your doctor. You may need to use less and less before you stop the medication completely.

Your blood pressure will need to be checked often. Visit your doctor regularly.

If you need surgery, tell the surgeon ahead of time that you are using Inderal. You may need to stop using the medicine for a short time.

Inderal is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.

If you are being treated for high blood pressure, keep using Inderal even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.

This medication can cause unusual results with certain medical tests. Tell any doctor who treats you that you are using Inderal.

Store Inderal at room temperature away from moisture and heat.

What happens if I miss a dose?

For regular (short-acting) Inderal: Take the missed dose as soon as you remember. Skip the missed dose if your next dose is less than 4 hours away.

For extended-release propranolol (Inderal LA, InnoPran XL and others): Take the missed dose as soon as you remember. Skip the missed dose if your next dose is less than 8 hours away.

Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include slow or uneven heartbeats, dizziness, weakness, or fainting.

What should I avoid?

Avoid drinking alcohol. It may increase your blood levels of Inderal.

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.

Inderal side effects

Get emergency medical help if you have any of these signs of an allergic reaction to Inderal: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • fast, slow, or uneven heartbeats;

  • feeling light-headed, fainting;

  • feeling short of breath, even with mild exertion;

  • swelling of your ankles or feet;

  • nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);

  • cold feeling in your hands and feet;

  • depression, confusion, hallucinations; or

  • severe skin reaction -- fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.

Less serious Inderal side effects may include:

  • nausea, vomiting, diarrhea, constipation, stomach cramps;

  • decreased sex drive, impotence, or difficulty having an orgasm;

  • sleep problems (insomnia); or

  • tired feeling.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect Inderal?

Tell your doctor about all other medications you use, especially:

  • cimetidine (Tagamet);

  • clonidine (Catapres);

  • digitalis (digoxin, Lanoxin);

  • dobutamine (Dobutrex);

  • haloperidol (Haldol);

  • isoproterenol (Isuprel);

  • a blood thinner such as warfarin (Coumadin, Jantoven);

  • an antidepressant such as amitriptyline (Elavil, Vanatrip, Limbitrol), clomipramine (Anafranil), desipramine (Norpramin), imipramine (Janimine, Tofranil), and others;

  • an MAO inhibitor such as furazolidone (Furoxone), isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam, Zelapar), or tranylcypromine (Parnate);

  • aspirin or other NSAIDs (non-steroidal anti-inflammatory drugs) such as ibuprofen (Advil, Motrin), naproxen (Aleve, Naprosyn, Naprelan, Treximet), celecoxib (Celebrex), diclofenac (Arthrotec, Cambia, Cataflam, Voltaren, Flector Patch, Pennsaid, Solareze), indomethacin (Indocin), meloxicam (Mobic), and others;

  • doxazosin (Cardura), prazosin (Minipress), terazosin (Hytrin);

  • heart or blood pressure medicine such as amlodipine (Norvasc, Caduet, Exforge, Lotrel, Tekamlo, Tribenzor, Twynsta, Amturnide), diltiazem (Cartia, Cardizem), nifedipine (Nifedical, Procardia), reserpine (Serpasil), verapamil (Calan, Covera, Isoptin, Verelan), and others;

  • amiodarone (Cordarone, Pacerone), propafenone (Rythmol), quinidine (Quin-G); or

  • an ACE inhibitor such as benazepril (Lotensin), captopril (Capoten), fosinopril (Monopril), enalapril (Vasotec), lisinopril (Prinivil, Zestril), moexipril (Univasc), perindopril (Aceon), quinapril (Accupril), ramipril (Altace), or trandolapril (Mavik).

This list is not complete and other drugs may interact with Inderal. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Where can I get more information?

  • Your pharmacist can provide more information about Inderal.
  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Inderal only for the indication prescribed.
  • Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects.

Copyright 1996-2014 Cerner Multum, Inc. Version: 11.01. Revision Date: 2012-10-22, 2:34:16 PM.

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