Hydrochlorothiazide and metoprolol
Medically reviewed on October 16, 2017
What is hydrochlorothiazide and metoprolol?
Hydrochlorothiazide is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention.
Metoprolol is a beta-blocker. Beta-blockers affect the heart and circulation (blood flow through arteries and veins).
Hydrochlorothiazide and metoprolol is a combination medicine used to treat high blood pressure (hypertension).
Hydrochlorothiazide and metoprolol may also be used for purposes not listed in this medication guide.
You should not use hydrochlorothiazide and metoprolol if you have a serious heart condition such as "sick sinus syndrome" or "AV block" (unless you have a pacemaker), slow heartbeats that have caused you to faint, or if your heart cannot pump blood properly.
You should not use this medicine if you are unable to urinate.
Do not stop using this medicine suddenly, even if you feel fine. Stopping suddenly may cause serious or life-threatening heart problems. Follow your doctor's instructions about tapering your dose.
Before taking this medicine
You should not use this medicine if you are allergic to hydrochlorothiazide or metoprolol, or if you have:
a serious heart condition such as "sick sinus syndrome" or "AV block" (unless you have a pacemaker), or if your heart cannot pump blood properly;
slow heartbeats that have caused you to faint;
severe or uncontrolled heart failure;
an allergy to sulfa drugs; or
if you are unable to urinate.
To make sure hydrochlorothiazide and metoprolol is safe for you, tell your doctor if you have:
congestive heart failure;
blood circulation problems;
asthma or other breathing disorder;
a thyroid disorder;
kidney disease (or if you are on dialysis);
pheochromocytoma (tumor of the adrenal gland);
high cholesterol or triglycerides.
It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
Hydrochlorothiazide and metoprolol can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
How should I take hydrochlorothiazide and metoprolol?
Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not use this medicine in larger or smaller amounts or for longer than recommended.
You may take hydrochlorothiazide and metoprolol with or without food.
You may have very low blood pressure while taking this medicine. Call your doctor if you are sick with vomiting or diarrhea, or if you are sweating more than usual. Prolonged illness can lead to a serious electrolyte imbalance, making it dangerous for you to use hydrochlorothiazide and metoprolol.
Your blood pressure will need to be checked often. You may also need frequent blood tests.
If you are diabetic, check your blood sugar carefully. Taking hydrochlorothiazide and metoprolol can make it harder for you to tell when you have low blood sugar. Do not change your medication dose or schedule without your doctor's advice.
If you need surgery, tell the surgeon ahead of time that you are using hydrochlorothiazide and metoprolol.
Keep using this medicine as directed, even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medicine for the rest of your life.
Do not stop using hydrochlorothiazide and metoprolol suddenly, even if you feel fine. Stopping suddenly may cause serious or life-threatening heart problems. Follow your doctor's instructions about tapering your dose.
Store at room temperature away from moisture and heat.
What happens 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 happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include fast or slow heart rate, trouble breathing, or fainting.
What should I avoid while taking hydrochlorothiazide and metoprolol?
This medicine may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert. 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.
Drinking alcohol can further lower your blood pressure and may increase certain side effects of hydrochlorothiazide and metoprolol.
Avoid becoming overheated or dehydrated during exercise and in hot weather. Follow your doctor's instructions about the type and amount of liquids you should drink. In some cases, drinking too much liquid can be as unsafe as not drinking enough.
Hydrochlorothiazide and metoprolol side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
bronchospasm (wheezing, chest tightness, trouble breathing);
slow heart rate, weak pulse, fainting, slow breathing (breathing may stop);
blurred vision, tunnel vision, eye pain, or seeing halos around lights;
low levels of sodium in the body--headache, confusion, slurred speech, severe weakness, vomiting, loss of coordination, feeling unsteady.
Common side effects may include:
tired feeling; or
stuffy nose, sore throat.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
Hydrochlorothiazide and metoprolol dosing information
Usual Adult Dose for Hypertension:
-Hydrochlorothiazide 25 to 50 mg-Metoprolol 100 to 200 mg orally per day in single or divided doses
-Initial dose: Hydrochlorothiazide 12.5 mg-Metoprolol 25 mg orally once a day
-Maximum dose: Hydrochlorothiazide 25 mg-Metoprolol 200 mg orally once a day
-Hydrochlorothiazide doses greater than 50 mg per day are not recommended.
-Immediate-release metoprolol (tartrate) may be administered once a day, but lower doses (100 mg) may not maintain a full effect for 24 hours; measure blood pressure near the end of the dosing interval to determine adequate control; larger or more frequent doses may be required.
-Extended-release metoprolol (succinate) may be titrated after 2 weeks.
-Beta-1 selectivity decreases as the metoprolol dose is increased.
What other drugs will affect hydrochlorothiazide and metoprolol?
Tell your doctor about all your current medicines and any you start or stop using, especially:
This list is not complete. Other drugs may interact with hydrochlorothiazide and metoprolol, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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