Get a Hydralazine prescription online

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Hydralazine helps lower blood pressure in people with hypertension. It works by relaxing blood vessels. This medication can help reduce the risk of heart attack, stroke and kidney issues.

Please note: At this time, this medication is only prescribed as a refill at Dr. B.

* Prescription treatment requires a virtual medical consultation with a medical provider to determine if a prescription is appropriate.

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How Dr. B treats high blood pressure

Health assessment

Tell us about your condition with a $15 online consultation—no video call necessary.

Provider review

A medical provider will review your information and prescribe treatment, if appropriate.

Get your medication

Pick up and pay for the medication at the pharmacy of your choice. Or, get it delivered.

About Hydralazine

How does it work?

This hypertension medicine belongs to a class of drugs known as vasodilators. It works by relaxing and widening the blood vessels so blood flows more easily.

What does it treat?

Hydralazine is primarily used to treat high blood pressure (hypertension). When combined with a healthy diet and exercise plan, it can also reduce the risk of heart attack, stroke and kidney failure.

What forms does it come in?

This blood pressure medicine comes as a tablet that’s taken by mouth.

Hydralazine vs. Apresoline

Apresoline is a brand name for this drug. All brands have been discontinued so this medicine is only available by its generic name.

The brand drug Apresoline is not currently available on the Dr. B platform.

How much will it cost?

Dr. B offers online consultations for $15—which is less than most copays. If a high blood pressure prescription is appropriate, your out-of-pocket medication cost will depend on your insurance and where you decide to get your prescription filled. With a drug discount card, prices for Hydralazine 10 mg (120 tablets) start at $4.09.

* Prices shown with drug discount card applied. Price may differ depending on location.

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Starting at

Hydralazine 10 mg (120 tablets)*

More High Blood Pressure (Hypertension) Prescription Refills

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Common Questions

Hydralazine prescription FAQ

What are the benefits of taking Hydralazine?
  • Lowers blood pressure
  • Improves blood flow to the heart
  • Reduces the workload on the heart
  • Helps manage certain heart conditions
  • Protects kidney function
Who should not take this medication?
  • Those who are allergic to Hydralazine
  • People with a known allergy or severe reaction to vasodilators
  • Pregnant women, breastfeeding or those planning to become pregnant
  • Those who have low blood pressure (hypotension)
  • People with severe heart conditions or heart failure
  • Those with certain neurological conditions, such as cerebral vascular insufficiency
  • People with severe aortic stenosis (a narrowing of the aortic valve)
  • People with constrictive pericarditis (a condition that causes the lining around the heart to thicken and tighten)
  • People with lupus erythematosus (an autoimmune disease that can affect many parts of the body, including the heart)

Taking this medication when you have these conditions should be carefully and closely monitored by a healthcare provider—speak with your healthcare provider before starting this medication.

Also tell your medical provider about any other medications you’re using before you start this hypertension treatment.

How do you take this medication?

This medication is taken by mouth, usually two to four times a day. Food can affect how much medicine stays in your body. You can take this medicine with or without food, but it’s important to be consistent. If you choose to take this medicine with food, make sure you always take it the same way.

High blood pressure is a long-term (chronic) condition that can harm your organs. Medications for blood pressure are not a one-time cure. This medicine doesn't provide a complete cure for high blood pressure, so it's important to continue taking it, even if you start feeling better. If you stop taking it suddenly, this could cause dangerous problems, like heart attack or stroke. Follow your medical provider's instructions carefully.

What happens if I miss a dose?

If you miss a dose of your blood pressure medicine, just take it as soon as you remember. If it's close to the next scheduled dose, skip the missed one and resume your regular dosing schedule. Don’t take two pills to catch up.

What happens if I take too much?

Taking too much of your blood pressure medicine can lead to symptoms like headache, rapid heartbeat, difficulty breathing and even heart attack.

If you’ve taken too much Hydralazine, call your medical provider or local poison control center (800-222-1222) immediately.

Can I get Hydralazine online?

Yes! Just complete an online health survey through Dr. B. A licensed medical provider will then review your health history. If appropriate, they will send an online refill to your pharmacy of choice.

Medically reviewed

To help you stay safe

“Our most valuable asset is our health. Whether you're a billionaire CEO or a single mom of multiple children—whatever your situation is—you can't do that without your health.”

Dr. Sudip Bose
Dr. Sudip Bose, M.D.Primary Care advisor

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Side Effects

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Let your healthcare provider know if you experience bothersome side effects or if you have any other concerns about your treatment. The most common side effects are:

  • Headache
  • Flushing
  • Dizziness
  • Nausea
  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Chest pain
  • Changes in heart rhythm
  • Muscle cramps
  • Joint pain
  • Constipation
  • Rash
  • Itching

Talk to your health provider if your side effects are bothering you or if they don’t get better. Get emergency help right away if you experience serious side effects such as severe allergic reaction (hives, swelling of the face, throat, or tongue, difficulty breathing), severe low blood pressure (lightheadedness, fainting) or if you notice symptoms of a heart attack, like chest pain or tightness, sweating or shortness of breath.

In rare cases, Hydralazine may lead to "Hydralazine induced lupus." This condition can lead to symptoms such as arthralgia (joint pain), myalgia (muscle pain), fever, rash (including malar rash), hepatosplenomegaly (enlargement of the liver and spleen), lymphadenopathy (swollen lymph nodes), and pleuritis (inflammation of the lining around the lungs). In some cases, individuals may experience glomerulonephritis (kidney inflammation), neuropsychiatric manifestations, and pericarditis (inflammation of the lining around the heart). If you observe any of these symptoms, it's important to seek medical attention right away.

Don’t drive until you know how this medicine affects you. Be extra careful in the first hours after taking your pill because of the risk of dizziness or lightheadedness.

Getting your blood tested regularly is important to monitor your overall health. It's a good idea to have your bloodwork checked, which may include tests for renal function, glucose levels or potassium levels in your blood. These routine checks help ensure you are in good health and catch any potential issues early.