Generic name: Acebutolol hydrochloride.

Sectral is a beta-adrenergic blocking agent (beta-blocker). Beta-blockers decrease the workload of the heart and help regulate the heartbeat.

Quick Facts About Sectral


Used to treat high blood pressure, angina (crushing chest pain), and abnormal heart rhythms.

Sectral Dosage

Take with or without food as directed by your doctor. Take exactly as prescribed, even if symptoms disappear. Must be taken regularly for Sectral to be effective.

  • Usual adult dose: for hypertension — 400 milligrams per day in a single dose or 2 doses of 200 milligrams each in the case of mild to moderate hypertension. Maximum daily dose is 800 milligrams. For severe hypertension — may be prescribed up to 1,200 milligrams per day divided into 2 doses. For irregular heartbeat — 400 milligrams per day divided into 2 doses, initially. Doctor may increase to 600 to 1,200 milligrams per day. Seniors — dose based on individual needs; not prescribed more than 800 milligrams per day.
  • Usual child dose: not generally prescribed for children.
  • Missed dose: take dose unless within 4 hours of next dose. Otherwise, do not take the missed dose; go back to your regular schedule. Do not double doses.

Sectral Side Effects

Overdose symptoms:

changes in heartbeat (unusually slow, unusually fast, or irregular), severe dizziness or fainting; difficulty breathing; bluish-colored fingernails or palms; seizures. If you suspect an overdose, immediately seek medical attention.

More common side effects: abnormal vision, chest pain, constipation, cough, decreased sexual ability, depression, diarrhea, dizziness, fatigue, frequent urination, gas, headache, indigestion, joint pain, nasal inflammation, nausea, shortness of breath or difficulty breathing, strange dreams, swelling due to fluid retention, trouble sleeping, weakness.

Less common Sectral side effects: abdominal pain, anxiety, back pain, burning eyes, cold hands and feet, conjunctivitis, dark urine, excessive urination at night, eye pain, fever, heart failure, impotence, low blood pressure, muscle pain, nervousness, painful or difficult urination, rash, slow heartbeat, throat inflammation, vomiting, wheezing.


Inform your doctor before combining Sectral with:

albuterol (the airway-opening drug Ventolin); certain blood pressure medicines such as reserpine (Diupres); certain over-the-counter remedies and nasal drops such as Afrin, Neo-Synephrine, and Sudafed: nonsteroidal anti-inflammatory drugs such as Motrin and Voltaren; oral diabetes drugs such as Micronase.

No known food/other substance interactions.

Special Cautions

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

Dosage level may be adjusted to meet particular needs.

Not generally prescribed for children.

  • If you experience difficulty breathing, or develop hives or large areas of swelling, immediately seek medical attention. You may be having a serious allergic reaction.
  • Use caution if you have had congestive heart failure, very slow heart rate, or heart block.
    Sectral should not be stopped suddenly, can cause increased chest pain and heart attack.
  • People with asthma, seasonal allergies, other bronchial conditions, coronary artery disease, or kidney or liver disease should use caution.
  • If you are diabetic, immediately inform your doctor. Sectral may cover the symptoms of low blood sugar or alter blood sugar levels.
  • Notify your doctor or dentist in a medical emergency or before surgery.

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 Sectral side effects, please contact your healthcare provider