Generic name: Nisoldipine.

Other brand name: Syscor.

Sular is a calcium channel blocker. It increases the amount of oxygen that reaches the heart muscle. 

Quick Facts About Sular


Used to treat high blood pressure.

Sular Dosage

Take exactly as prescribed. Try not to miss doses; condition may worsen if you miss doses. Must take regularly to be effective against high blood pressure, and can take several weeks before full effects are observed. Continue to take even if feeling well.

  • Usual adult dose:  initially — 20 milligrams once per day. Doctor will increase dose to 40 to 60 milligrams. Seniors and people with liver disease, initially — 10 milligrams once per day. Doctor will increase dose to 40 to 60 milligrams once per day.
  • Usual child dose: not generally prescribed for children.
  • Missed dose: take as soon as possible, unless almost time for next dose. In that case, do not take misused dose; go back to regular schedule. Do not double doses.

Sular Side Effects

Overdose symptoms:

no specific information available about Sular; however, overdose symptoms d calcium channel blockers are drowsiness, severe low blood pressure, slow heartbeat. If you suspect an overdose, immediately seek medical attention.

More common side effects: dizziness, flushing headache, heart palpitations, sinus irritation, sore throat, swelling in arms and legs. Side effects are usually mild.

Less common Sular side effects: chest pain, nausea, rash. Rare side effects may affect any system in the boa


Inform your doctor before combining Sular with:

beta-blockers such as Inderal, Lopressor, and Tenormin; cimetidine (Tagamet); quinidine (Quinalan).

Avoid fatty foods and any grapefruit product during Sular therapy; could lead to high levels of the in your blood.

Special Cautions

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

Seniors are prescribed a lower starting dose and less likely to experience headache.

Not generally prescribed for children.

  • If sensitive or allergic to this or other calcium channel blockers, should not take.
  • Use with caution if you have congestive heart failure or other heart problems.
  • Inform your doctor before treatment if you have liver disease.
  • If you experience angina pain when you begin treatment, when the dosage is increased, or when the drug is rapidly withdrawn, change dosage gradually.
  • Contact your doctor immediately if you experience swelling in the arms or legs, breathing difficulties, abnormal heartbeat, increased heart pain, dizziness, constipation, nausea, light-headedness, or very low blood pressure.

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 Sular side effects, please contact your healthcare provider