NOTICE TO PATIENTS AND HEALTH CARE PROFESSIONALS: Validus is no longer manufacturing or distributing this product. This website is maintained solely for reference purposes. Patients — Validus recommends that you talk to your Health Care Professional about alternative therapies.


Lopressor HCT® (metoprolol tartrate and hydrochlorothiazide) Tablets come in tablet form, which can be taken by mouth. The specific dosage of Lopressor HCT that your doctor prescribes for you will depend on your medical condition and your response to treatment.

Take this medicine exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label. Do not suddenly stop taking this medicine without consulting your doctor because your condition may worsen if you suddenly stop taking Lopressor HCT.

If you 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 for the missed dose.

Take the medicine with a meal or right after you eat.

Your doctor may occasionally change your dose to make sure you get the best results.

Lopressor HCT is not indicated for the initial therapy of hypertension. Hydrochlorothiazide is usually given at a dosage of 12.5 to 50 mg per day. The usual dosage of Lopressor is 100 to 450 mg daily in one or two doses. If the combination represents the dose titrated for your needs, then therapy with the fixed combination may be more convenient than with the separate components.

Tell your doctor if your condition does not improve or worsens.

Do not stop using Lopressor HCT suddenly, or you could have serious or life-threatening heart problems. Talk to your doctor about how to avoid withdrawal symptoms when stopping the medicine.

Conditions that may cause very low blood pressure include vomiting, diarrhea, heavy sweating, heart disease, dialysis, a low salt diet or taking diuretics (water pills). Tell your doctor if you have a prolonged illness that causes diarrhea or vomiting.

Your blood pressure will need to be checked often. Your kidney function may also need to be checked. You blood and urine may also be tested if you have been vomiting or are dehydrated. Visit your doctor regularly.


You should not take this medication if you have:

  • Severe or uncontrolled heart failure
  • Sick Sinus syndrome – a heart condition where you have arrythmias
  • Heart block or slow cardiac arrhythmias (bradycardia)
  • Severe blood circulation problems
  • An adrenal gland tumor
  • An allergy to any beta-blocker medicines such as atenolol (Tenormin, Tenoretic), carvedilol (Coreg), labetalol (Normodyne, Trandate), metoprolol (Dutoprol, Lopressor, Toprol), nadolol (Corgard), propranolol (Inderal, InnoPran), sotalol (Betapace), and others
  • If you are unable to urinate
  • If you have bronchospastic disease

Before using this medication, tell your doctor if you have any of the following:

  • Congestive heart failure
  • Kidney or liver disease
  • Cirrhosis
  • Glaucoma
  • Asthma or bronchitis
  • Gout
  • Lupus
  • Diabetes
  • A thyroid disorder
  • An allergy to sulfa drugs, penicillin, or any of the ingredients of Lopressor HCT [metoprolol tartrate; hydrochlorothiazide; or any of the inactive ingredients including cellulose compounds, colloidal silicon dioxide, D&C Yellow No. 10 (100/50 tablets), FD&C Blue No. 1 (50/25 tablets), FD&C Red No. 40 and FD&C Yellow No. 6 (100/25 tablets), lactose, magnesium state, providone, sodium starch glycolate, corn starch, stearic acid, and sucrose]

If you are diabetic, you must check your blood sugar carefully. Using Lopressor HCT can make it harder for you to tell when you have low blood sugar. Be sure to watch for signs of low blood sugar (e.g., anxiety, chills, dizziness, drowsiness, fainting, headache, tremor, unusual sweating, vision changes, weakness). Tell your doctor right away if you notice any of these symptoms. Your insulin or diabetic needs may change while you are taking Lopressor HCT. Talk with your doctor before changing any doses.

Drinking alcohol can further lower your blood pressure and may increase certain side effects of Lopressor HCT.

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 may be as unsafe as not drinking enough.

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.

This medication may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert until the response to this therapy has been determined.

Keep taking this medicine even if you feel fine. High blood pressure often has no symptoms.

It is not known if Lopressor HCT will cause harm to an unborn child. Tell your doctor if you are pregnant or plan to become pregnant while using this medicine.

Hydrochlorothiazide and metoprolol can pass into breast milk and may harm a nursing baby. You should not breastfeed while using this medication.


Download Full Prescribing Information

LOPRESSOR HCT® (metoprolol tartrate and hydrochlorothiazide)


Individuals with sinus bradycardia, heart block greater than firth degree, cardiogenic shock, overt cardiac failure, sick-sinus syndrome, and severe arterial circulatory disorders should not use Lopressor HCT® (metoprolol tartrate and hydrochlorothiazide) Tablets.

Individuals with hypersensitivity to Lopressor HCT and related derivatives, or to any of the excipients, or hypersensitivity to any other beta blockers should not take Lopressor HCT.

Individuals with anuria or hypersensitivity to sulfamide-derived drugs should not take hydrochlorothiazide.



Cardiac Failure: If you are hypertensive and have congestive heart failure controlled by digitalis and diuretics, Lopressor HCT should be administered cautiously.

In Patients Without a History of Cardiac Failure: At the first sign of impending cardiac failure, you should be given digitalis and/or a diuretic and, if cardiac failure continues, Lopressor HCT should be withdrawn.

Ischemic Heart Disease: Abrupt cessation of Lopressor HCT therapy can cause exacerbation of angina pectoris and in some cases, myocardial infarction. Even in the absence of angina pectoris and myocardial infarction, Lopressor HCT should never be withdrawn abruptly.


Major Surgery: You should NOT discontinue Lopressor HCT therapy prior to major surgery, but be sure to tell your surgeon that you are taking Lopressor HCT prior to any surgery.

Diabetes: If you have diabetes, Lopressor HCT should be taken with caution as the use of Lopressor HCT may mask tachycardia occurring with hypoglycemia.

Pheochromocytoma: If you have pheochromocytoma you should only use Lopressor HCT in combination with an alpha blocker, and only after the alpha blocker has been initiated.

Thyrotoxicosis: If your doctor thinks that you may be at risk of developing thyrotoxocosis, your doctor should manage your Lopressor HCT use carefully to avoid abrupt withdrawal of the beta blockade.


If you have severe renal disease, impaired hepatic function or progressive liver disease, you should use Lopressor HCT with caution. Similarly, thiazides may add to the action of other antihypertensive drugs.

Hydrochlorothiazide can cause acute transient myopia and acute angle-closure glaucoma, particularly for those individuals with a history of allergy to sulfonamide or penicillin.


Lopressor HCT should be used with caution if you have impaired hepatic function.

If you are taking Lopressor HCT, you should be observed for fluid or electrolyte imbalance, hypokalemia (especially in cases of brisk diuresis or severe cirrhosis or interference with adequate oral intake of electrolytes). Individuals with problems with low blood salt content and edema in hot weather may require water restriction, or in severe cases, salt administration. This should be monitored by your doctor.

Thiazides may also cause hyperuricemia, latent diabetes, and enhanced antihypertensive effects in postsympathectomy patients. If you have progressive renal impairment, withholding or discontinuing diuretic therapy should be considered.

Patients should take Lopressor HCT regularly and continuously, as directed, with or immediately following meals. If a dose is missed, the patient should take only the next scheduled dose (without doubling it). Patients should not discontinue Lopressor HCT without consulting their doctor.

Patients should (1) avoid operating automobiles or machinery or engaging in other tasks requiring alertness until the patients response to Lopressor HCT has been determined; (2) contact their doctor is any difficulty in breathing occurs; and (3) inform their doctor or dentist before any surgery that he or she is taking Lopressor HCT.

Drug/Drug Interactions


Catecholamine-depleting drugs (e.g. reserpine) may have an additive effect when given with Lopressor HCT.

Both digitalis glycosides and beta blockers slow atrioventricular conduction and decrease heart rate, so use of both medicines together can increase the risk of bradycardia.

If you have a history of severe anaphylactic reaction to a variety of allergens and take Lopressor HCT, you may be more reactive to repeated challenge, either accidental, diagnostic, or therapeutic and you may be unresponsive to the usual doses of epinephrine used to treat allergic reaction.

If you are taking potent inhibitors of the CYP2D6 enzyme, exercise caution and speak with your doctors about using both medicines as CYP2D6 inhibitors increase plasma concentration of Lopressor HCT. Inhibors of the CYP2D6 enzyme include certain antidepressants such as fluoxetine, paraoxetine, or bupropion; antipsychotics such as thioridazine; antiarrhythmics such as quinidine or propafenone; antiretrovirals such as ritonavir; antihistimines such as diphenhydramine; antimalarials such as hydroxychloroquine or quinidine; antifungals such as terbinafine; and medications for stomach ulcers such as cimetidine.

If you are taking Lopressor HCT and clonidine treatment at the same time, and clonidine treatment is to be discontinued, the Lopressor HCT treatment should be withdrawn several days before discontinuing clonidine.


Hydrochlorothiazide can exaggerate the response of the heart to the toxic effects of digitalis (e.g., increased ventricular irritability). Hypokalemia may develop during simultaneous use of steroids or ACTH. Insulin requirements in diabetic patients may change during Loressor HCT use. Thiazides may decrease the responsiveness of the heart to norepinephrine and increase responsiveness to tubocurarine. Lithium renal clearance is reduced by thiazides. Taking some nonsteroidal anti-inflammatory agents may reduce the diuretic, natriuretic, and antihypertensive effects of thiazide.


There are no adequate and well-controlled studies of Lopressor HCT in pregnant women. Lopressor HCT should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.


Fatigue or lethargy and flu syndrome, dizziness or vertigo, drowsiness or somnolence, and headache have been reported in 10% of patients. Hypokalemia has been reported in less than 10% of patients. Bradycardia has been reported in 6% of patients. Decreased exercise tolerance and dyspnea, and diarrhea; digestive disorder, dry mouth, nausea or vomiting, and constipation; edema, gout, and anorexia; blurred vision, tinnitus, and earache; and sweating, purpura, impotence, and muscle pain have been reported in 1% of patients.

To report SUSPECTED ADVERSE REACTIONS, contact Validus Pharmaceuticals, LLC at — VALIDUS (1-866-982-5438) or FDA at 1-800-FDA-1088 or

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