Generic name: Propranolol hydrochloride.

Other brand names: Inderal LA.

Inderal is a beta-adrenergic blocking agent (beta-blocker). It slows the heart rate and reduces high blood pressure. 

Quick Facts About Inderal


Used to treat high blood pressure, chest pain, changes in heart rhythm, hereditary tumors, hypertrophic subaortic stenosis, and adrenal gland tumors. Also used to prevent migraines and recurring heart attacks.

Inderal Dosage

Take exactly as prescribed. If you miss doses, may worsen condition. Best if taken before meals. May take weeks to observe results if taking for high blood pressure; must continue to take even if you begin to feel better. Medication should not be stopped suddenly; gradually taper off.

  • Usual adult dose: for high blood pressure — 40 milligrams taken 2 times per day, increased to 120 to 240 or in some cases 640 milligrams per day for maintenance. May take days or weeks for maximum results. Doctor may prescribe taking 3 times per day. For chest pain — 80 to 320 milligrams divided into 2, 3, or 4 smaller doses. For irregular heartbeat — 10 to 30 milligrams taken 3 or 4 times per day before meals and at bedtime. For heart attack — 180 to 240 milligrams divided into smaller doses. For migraine — 80 milligrams per day divided into smaller doses; may be increased by your doctor to between 160 to 240 milligrams per day. Should see relief in 4 to 6 weeks, otherwise doctor will gradually taper you off medication. For tremors — 40 milligrams, 2 times per day to start; may be increased up to 320 milligrams maximum per day. For hypertrophic subaortic stenosis — 20 to 40 milligrams taken 3 to 4 times per day before meals and at bedtime. Before adrenal gland therapy — 60 milligrams per day divided into smaller doses for 3 days prior to surgery. For inoperable tumors — 30 milligrams per day divided into smaller doses. Seniors — dosage is according to individual needs.
  • Usual child dose: individualized for each child. Doses range from 2 to 4 milligrams per 2.2 pounds of body weight daily, divided into 2 equal doses, up to 16 milligrams per 2.2 pounds of body weight per day. When discontinuing this medication, it should be tapered off over a 7 to 14 day period.
  • Missed dose: take as soon as possible, unless within 8 hours of next dose. In that case, do not take missed dose; go back to regular schedule. Do not double doses.

Inderal Side Effects

Overdose symptoms:

extremely slow heartbeat, iris; regular heartbeat low blood pressure, severe congestive heart failure, seizures, wheezing. If you suspect an overdose, immediately seek medical attention.

More common side effects: abdominal cramps, colitis, congestive heart failure, constipation, decreased sexual ability, depression, diarrhea, difficulty breathing, disorientation, dry eyes, fever with sore throat, hair loss, hallucinations, headache, light-headedness, low blood pressure, lupus erythematosus, nausea, rash, reddish or purplish skin spots, short-term memory loss, slow heartbeat, tingling, prickling in hands, tiredness, trouble sleeping, upset stomach, visual changes, vivid dreams, vomiting, weakness, worsening of certain heartbeat irregularities.

No known less common or rare Inderal side effects.


Inform your doctor before combining Inderal with:

aluminum hydroxide gel (Amphojel); calcium blockers such as Cardizem, Procardia, and Calan; high blood pressure medications (Diupres and Ser-Ap-Es); chlorpromazine (Thorazine): cimetidine (Tagamet); epinephrine (EpiPen); haloperidol (Haldol); insulin; lidocaine (Xylocaine); nonsteroidal anti-inflammatory medications such as Motrin and Naprosyn; oral diabetes medications such as Micronase; phenobarbital; phenytoin (Dilantin); rifampin (Rifadin); theophylline (Theo-Dur); thyroid medications such as Synthroid.

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 infant.

Dosage for seniors is according to individual needs.

Follow doctor’s instructions carefully for children.

  • Should not take, or use with extreme caution, if you have: bronchial asthma, certain types of irregular heartbeat, inadequate blood supply to the circulatory system, kidney or liver disease, severe congestive heart failure, or slow heartbeat. Doctor will decide whether to prescribe based on your condition.
  • May want to monitor pulse for slow heartbeat; check with your doctor.
  • Inform your doctor if you are diabetic; medication may cover the symptoms of low blood sugar or alter blood sugar levels.
  • Inform your doctor or dentist prior to surgery or dental treatment.

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 Inderal side effects, please contact your healthcare provider.