Hydralazine Oral : Uses, Side Effects, Interactions



Hydralazine is used to treat hypertension or with other medicines. Reducing hypertension helps in preventing stroke, heart attack and kidney problems. Hydralazine is called a vasodilator. It works by relaxing the blood vessels so that the blood flows more smoothly in the body.

How To Use Hydralazine HCL

Take Hydralazine with mouth or without food, usually 2 to 4 times daily or as directed by your doctor. Dosage is based on your medical condition and treatment response. Your doctor may start you at low doses and gradually increase your dose. Follow your doctor’s instructions carefully.

Use Hydralazine regularly to get the most benefit. To help you remember, take it every day at the same time. It is important to continue taking this medicine even if you feel OK. Most people with high blood pressure do not feel sick. It may take several weeks for you to get the full benefit of this drug.

Do not stop taking this medicine without consultation with your doctor. When the drug suddenly stops, some conditions may get worse. Your dose may need to be gradually decreased.

Tell your doctor if you lose your condition (for example, your regular blood pressure reading increases).

Side Effects

Headache, fast / fast heartbeat, loss of appetite, nausea, vomiting, diarrhea or dizziness can occur because your body gets adjusted with medication. If any of these effects persists or worsens, tell your doctor or pharmacist immediately.

To reduce the risk of dizziness, slowly rise while sitting or lying down from the position of lying.

Remember that your doctor has prescribed this drug because he or she has decided that the benefit is higher than the risk of side effects. Many people using this drug do not have serious side effects.

Hydralazine can rarely cause nervous problems. If you experience numbness or tingling, tell your doctor immediately. Your doctor may recommend vitamin B 6 supplement (pyridoxine).

Tell your doctor immediately if there are no potential but serious side effects: severe fatigue, pain / swelling in the joints, swelling on the nose and cheeks, swelling in the glands, signs of renal problems (such as changes in the amount of urine , Bloody / pink urine), sign of infection (such as fever, chills, frequent sore throat), easy injury / bleeding

If you have this rare but serious side effect, seek immediate medical attention: chest / jaw / pain in the left hand.

A very serious allergic reaction to this drug is rare. However, if you see any of the following symptoms of a serious allergic reaction, then seek immediate medical attention: granular, itching / swelling (especially the face / tongue / throat), severe dizziness, shortness of breath .

This is not a complete list of possible side effects. If you do not list other effects above, contact your doctor or pharmacist.

In America – Call your doctor for medical advice about side effects. You can notify the FDA of side effects on 1-800-FDA-1088 or www.fda.gov/medwatch.

In Canada – Call your doctor for medical advice about side effects. You can report the health effects of Canada on 1-866-234-2345.


Before taking hydralazine, tell your doctor or pharmacist whether you are allergic to it; Or if you have any other allergens. This product can have passive elements, which can cause allergic or other problems. Talk to your pharmacist for more details.

If you have some medical condition then this drug should not be used. Before using this drug, consult your doctor or pharmacist if you have: a certain cardiovascular condition (coronary artery disease), a fixed heart valve problem (rheumatic heart disease of the mitral valve).

Before using Hydralazine, tell your doctor or pharmacist your medical history, in particular: problems of blood vessel, previous stroke, kidney problems

This medication can make you dizzy. Alcohol or marijuana (cannabis) can make you feel more dizzy. Unless you can safely do it, do not drive, use machinery, or do anything that requires caution. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).

Before surgery, tell your doctor or dentist that you are taking this medicine.

Older adults may be more susceptible to the side effects of this drug, especially dizziness, which can increase the risk of falling.

Hydralazine should be used only when explicitly required during pregnancy. Discuss the risks and benefits with your doctor.

This medicine passes in breast milk, but there is no possibility of harm to a nursing infant. Consult your doctor before breastfeeding.

Over Dose

If someone is treated and has serious symptoms like having trouble going out or breathing, call 911. Otherwise, call the Poison Control Center immediately. US residents can call their local venom control center at 1-800-222-1222. Canadians can call a provincial poison control center. Symptoms of overdose may include: severe dizziness, unconsciousness, flushing, chest / jaw / pain in left hand, irregular heartbeat


Do not share this medication with others.

Changes in lifestyle such as stress reduction programs, exercise and dietary changes can help this drug work better. Talk to your doctor or pharmacist about lifestyle changes that can benefit you.

Labs and / or medical tests (such as full blood count) can be performed periodically to monitor your progress or to examine side-effects. Consult your doctor for more details.

Check your blood pressure regularly while taking this medication. Learn to monitor your own blood pressure, and share the readings with your doctor.

Missed Dose

If you miss a dose, then as soon as you remember, take it. If it is near the next dose time, then leave the thesis dose. Take your next dose at regular times. Do not double the dose to catch up.


Store at room temperature between 59-86 ° F (15-30 ° C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.

Until instructed to do so, do not flush the medicines in the toilet and do not drain them. When this period expires or does not need it, then properly release this product. Consult your drug dealer or local waste disposal company to get more information about safely terminating your product.

Disclaimer: DrLinex has made every effort to ensure that all information is factually accurate, comprehensive and up-to-date. However, this article should not be used as a licensed health care professional’s choice of knowledge and expertise. You should always consult your doctor or other health care professional before taking any medication. The information given here is subject to change and it has not been used to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions or adverse effects. The lack of warning or other information for any drug does not indicate that the combination of medicine or medication is safe, effective or appropriate for all patients or all specific uses.

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