What is this medicine?
HYDRAZALINE is a vasodilator that works by relaxing the muscles in your blood vessels to help them dilate (widen). This lowers blood pressure and allows blood to flow more easily through your veins and arteries.
Hydralazine is used to treat high blood pressure (hypertension).
What should I tell my health care provider before I take this medicine?
You should not use this medication if you are allergic to hydralazine, or if you have:
- coronary artery disease; or
- rheumatic heart disease affecting the mitral valve.
Before taking hydralazine, tell your doctor if you are allergic to any drugs, or if you have:
- kidney disease,
- angina pectoris (chest pain); or
- if you have ever had stroke.
- If you have any of these conditions, you may need a dose adjustment or special tests to safely take this medication.
FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
Hydralazine can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
How should I take this medicine?
Take this medication exactly as prescribed by your doctor. Do not take it in larger amounts or for longer than recommended. Follow the directions on your prescription label.
To be sure this medication is helping your condition and is not causing harmful effects, your blood pressure will need to be checked often. You may also need occasional blood tests. Do not miss any scheduled appointments.
Keep using hydralazine as directed, even if you feel well. High blood pressure often has no symptoms, so you may not know when your blood pressure is high. You may need to use blood pressure medication for the rest of your life.
What if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What should I watch for while taking this medicine?
Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.
What side effects may I notice from this medicine?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- fast or pounding heartbeats;
- swelling in your face, stomach, hands, or feet;
- numbness, burning, pain, or tingly feeling;
- feeling like you might pass out;
- confusion, unusual thoughts or behavior;
- pale skin, easy bruising;
- painful or difficult urination;
- dark-colored urine;
- urinating less than usual or not at all; or
- joint pain or swelling with fever, chest pain, weakness or tired feeling.
Less serious side effects may include:
- nausea, vomiting, loss of appetite;
- diarrhea, constipation;
- muscle or joint pain;
- runny or stuffy nose; or
- mild itching or skin rash.
What may interact with this medicine?
Before taking hydralazine, tell your doctor if you are taking any of the following medicines:
- diazoxide (Hyperstat, Proglycem); or
- an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate).
This list is not complete and there may be other drugs that can interact with hydralazine. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.
Where can I keep my medicine?
Store at room temperature away from moisture and heat.