Hydralazine/Isosorbide dinitrate (BiDil) (hydralazine and isosorbide dinitrate) — Uses, Dosage, Side Effects & Safety

Drug class: Vasodilator combination (antihypertensive, heart failure therapy)

Overview

Hydralazine/Isosorbide dinitrate (BiDil) is a prescription medication used to treat heart failure, particularly in patients who cannot tolerate or do not respond well to other standard heart failure therapies. It is especially beneficial for self-identified Black patients with heart failure, as clinical studies have shown improved outcomes in this population. This medication combines two vasodilators: hydralazine, which relaxes arteries and lowers blood pressure, and isosorbide dinitrate, which relaxes veins and reduces the workload on the heart. Together, they help the heart pump more efficiently and reduce symptoms like shortness of breath and swelling. Key points for patients: Take BiDil exactly as prescribed, do not stop suddenly without consulting your doctor, and report any side effects or new symptoms promptly. Regular follow-up is important to monitor your response and adjust dosing if needed.

Therapeutic uses

  • Heart failure (specifically in self-identified Black patients)
  • Hypertension (adjunctive therapy)
  • Angina pectoris (off-label, due to isosorbide dinitrate component)

Common side effects

  • Headache
  • Dizziness
  • Nausea
  • Flushing
  • Palpitations
  • Orthostatic hypotension
  • Tachycardia

Frequently Asked Questions about Hydralazine/Isosorbide dinitrate (BiDil)

What is BiDil used for?

BiDil is used to treat heart failure, especially in patients who do not respond well to standard therapies or in self-identified Black patients, where it has shown improved outcomes.

How does BiDil work?

BiDil combines hydralazine, which relaxes arteries, and isosorbide dinitrate, which relaxes veins. This dual action reduces the heart's workload and improves blood flow.

Can I take BiDil with other heart medications?

Yes, BiDil is often used with other heart failure medications, but always under medical supervision to avoid interactions and side effects.

What should I do if I experience severe dizziness or fainting?

Sit or lie down immediately and seek medical attention if symptoms persist or are severe, as this may indicate low blood pressure.

Are there any foods or drinks I should avoid?

Avoid alcohol and limit foods high in sodium. Alcohol can increase side effects like dizziness.

Is BiDil safe during pregnancy or breastfeeding?

BiDil should only be used during pregnancy or breastfeeding if clearly needed and prescribed by your doctor. Discuss risks and benefits with your healthcare provider.

What are the signs of an allergic reaction to BiDil?

Signs include rash, itching, swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing. Seek emergency help if these occur.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.