DRUGS & SUPPLEMENTS
Benazepril; Hydrochlorothiazide uses
INDICATIONS AND USAGE
Benazepril; Hydrochlorothiazide tablets are indicated for the treatment of hypertension.
This fixed combination drug is not indicated for the initial therapy of hypertension.
Benazepril; Hydrochlorothiazide is contraindicated in patients who are anuric.
Benazepril; Hydrochlorothiazide is also contraindicated in patients who are hypersensitive to benazepril, to any other ACE inhibitor, to hydrochlorothiazide, or to other sulfonamide-derived drugs. Hypersensitivity reactions are more likely to occur in patients with a history of allergy or bronchial asthma.
Benazepril; Hydrochlorothiazide is also contraindicated in patients with a history of angioedema with or without previous ACE inhibitor treatment.
Anaphylactoid and Possibly Related Reactions
Presumably because angiotensin-converting enzyme inhibitors affect the metabolism of eicosanoids and polypeptides, including endogenous bradykinin, patients receiving ACE inhibitors may be subject to a variety of adverse reactions, some of them serious.
Head and Neck Angioedema
Angioedema of the face, extremities, lips, tongue, glottis, and larynx has been reported in patients treated with angiotensin-converting enzyme inhibitors. In U.S. clinical trials, symptoms consistent with angioedema were seen in none of the subjects who received placebo and in about 0.5% of the subjects who received benazepril. Angioedema associated with laryngeal edema can be fatal. If laryngeal stridor or angioedema of the face, tongue, or glottis occurs, treatment with Benazepril; Hydrochlorothiazide should be discontinued and appropriate therapy instituted immediately. When involvement of the tongue, glottis, or larynx appears likely to cause airway obstruction, appropriate therapy, e.g., subcutaneous epinephrine injection 1:1000 (0.3 mL to 0.5 mL) should be promptly administered (see PRECAUTIONS and ADVERSE REACTIONS ).
Black patients receiving ACE inhibitors have been reported to have a higher incidence of angioedema compared to nonblacks.
Intestinal angioedema has been reported in patients treated with ACE inhibitors. These patients presented with abdominal pain ; in some cases there was no prior history of facial angioedema and C-1 esterase levels were normal. The angioedema was diagnosed by procedures including abdominal CT scan or ultrasound, or at surgery, and symptoms resolved after stopping the ACE inhibitor. Intestinal angioedema should be included in the differential diagnosis of patients on ACE inhibitors presenting with abdominal pain.
Anaphylactoid Reactions During Desensitization
Two patients undergoing desensitizing treatment with hymenoptera venom while receiving ACE inhibitors sustained life-threatening anaphylactoid reactions. In the same patients, these reactions were avoided when ACE inhibitors were temporarily withheld, but they reappeared upon inadvertent rechallenge.
Anaphylactoid Reactions During Membrane Exposure
Anaphylactoid reactions have been reported in patients dialyzed with high-flux membranes and treated concomitantly with an ACE inhibitor. Anaphylactoid reactions have also been reported in patients undergoing low-density lipoprotein apheresis with dextran sulfate absorption.
Hypersensitivity reactions to hydrochlorothiazide are more likely in patients with allergy and asthma.
Benazepril; Hydrochlorothiazide can cause symptomatic hypotension. Like other ACE inhibitors, benazepril has been only rarely associated with hypotension in uncomplicated hypertensive patients. Symptomatic hypotension is most likely to occur in patients who have been volume and/or salt depleted as a result of prolonged diuretic therapy, dietary salt restriction, dialysis, diarrhea, or vomiting. Volume and/or salt depletion should be corrected before initiating therapy with Benazepril; Hydrochlorothiazide.
Benazepril; Hydrochlorothiazide should be used cautiously in patients receiving concomitant therapy with other antihypertensives. The thiazide component of Benazepril; Hydrochlorothiazide may potentiate the action of other antihypertensive drugs, especially ganglionic or peripheral adrenergic-blocking drugs. The antihypertensive effects of the thiazide component may also be enhanced in the postsympathectomy patient.
In patients with congestive heart failure, with or without associated renal insufficiency, ACE inhibitor therapy may cause excessive hypotension, which may be associated with oliguria, azotemia, and with acute renal failure and death. In such patients, Benazepril; Hydrochlorothiazide therapy should be started under close medical supervision; they should be followed closely for the first 2 weeks of treatment and whenever the dose of benazepril or diuretic is increased.
If hypotension occurs, the patient should be placed in a supine position, and, if necessary, treated with intravenous infusion of physiological saline. Benazepril; Hydrochlorothiazide treatment usually can be continued following restoration of blood pressure and volume.
Impaired Renal Function
Monitor renal function periodically in patients treated with Benazepril; Hydrochlorothiazide. Changes in renal function including acute renal failure can be caused by drugs that inhibit the renin-angiotensin system and by diuretics. Patients whose renal function may depend in part on the activity of the renin-angiotensin system (e.g., patients with renal artery stenosis, chronic kidney disease, severe congestive heart failure, or volume depletion) may be at particular risk of developing acute of acute renal failure on Benazepril; Hydrochlorothiazide. Consider withholding or discontinuing therapy in patients who develop a clinically significant decrease in renal function on Benazepril; Hydrochlorothiazide.
In a small study of hypertensive patients with unilateral or bilateral renal artery stenosis, treatment with benazepril was associated with increases in blood urea nitrogen and serum creatinine; these increases were reversible upon discontinuation of benazepril therapy, concomitant diuretic therapy, or both.
Another angiotensin-converting enzyme inhibitor, captopril, has been shown to cause agranulocytosis and bone marrow depression, rarely in uncomplicated patients but more frequently (incidence possibly as great as once per 1000 exposures) in patients with renal impairment, especially those who also have collagen-vascular diseases such as systemic lupus erythematosus or scleroderma. Available data from clinical trials of benazepril are insufficient to show that benazepril does not cause agranulocytosis at similar rates. Monitoring of white blood cell counts should be considered in patients with collagen-vascular disease, especially if the disease is associated with impaired renal function.
Pregnancy Category D
Use of drugs that act on the renin-angiotensin system during the second and third trimesters of pregnancy reduces fetal renal function and increases fetal and neonatal morbidity and death. Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations. Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure, and death. When pregnancy is detected, discontinue Benazepril; Hydrochlorothiazide as soon as possible. These adverse outcomes are usually associated with use of these drugs in the second and third trimester of pregnancy. Most epidemiologic studies examining fetal abnormalities after exposure to antihypertensive use in the first trimester have not distinguished drugs affecting the renin-angiotensin system from other antihypertensive agents. Appropriate management of maternal hypertension during pregnancy is important to optimize outcomes for both mother and fetus.
In the unusual case that there is no appropriate alternative to therapy with drugs affecting the renin-angiotensin system for a particular patient, apprise the mother of the potential risk to the fetus. Perform serial ultrasound examinations to assess the intra-amniotic environment. If oligohydramnios is observed, Benazepril; Hydrochlorothiazide should be discontinued unless it is considered life-saving for the mother. Fetal testing may be appropriate, based on the week of pregnancy. Patients and physicians should be aware, however, that oligohydramnios may not appear until after the fetus has sustained irreversible injury. Closely observe infants with histories of in utero exposure to Benazepril; Hydrochlorothiazide for hypotension, oliguria, and hyperkalemia.
No teratogenic effects of Benazepril; Hydrochlorothiazide were seen in studies of pregnant rats, mice, and rabbits. On a mg/m2 basis, the doses used in these studies were 60 times (in rats), 9 times (in mice), and more than 0.8 times (in rabbits) the maximum recommended human dose (assuming a 50-kg woman). On a mg/kg basis these these multiples are 300 times (in rats), 90 times (in mice), and more than 3 times (in rabbits) the maximum recommended human dose. When hydrochlorothiazide was orally administered without benazepril to pregnant mice and rats during their respective periods of major organogenesis, at doses up to 3000 mg/kg/day and 1000 mg/kg/day respectively, there was no evidence of harm to the fetus. Similarly, no teratogenic effects of benazepril were seen in studies of pregnant rats, mice, and rabbits; on a mg/kg basis, the doses used in these studies were 300 times (in rats), 90 times (in mice), and more than 3 times (in rabbits) the maximum recommended human dose.
Thiazides can cross the placenta, and concentrations reached in the umbilical vein approach those in the maternal plasma. Hydrochlorothiazide, like other diuretics, can cause placental hypoperfusion. It accumulates in the amniotic fluid, with reported concentrations up to 19 times higher than in umbilical vein plasma. Use of thiazides during pregnancy is associated with a risk of fetal or neonatal jaundice or thrombocytopenia. Since they do not prevent or alter the course of EPH (Edema, Proteinuria, Hypertension) gestosis (pre-eclampsia), these drugs must not be used to treat hypertension in pregnant women. The use of hydrochlorothiazide for other indications (e.g., heart disease) in pregnancy should be avoided.
Rarely, ACE inhibitors have been associated with a syndrome that starts with cholestatic jaundice and progresses to fulminant hepatic necrosis and (sometimes) death. The mechanism of this syndrome is not understood. Patients receiving ACE inhibitors who develop jaundice or marked elevations of hepatic enzymes should discontinue the ACE inhibitor and receive appropriate medical follow-up.
Systemic Lupus Erythematosus
Thiazide diuretics have been reported to cause exacerbation or activation of systemic lupus erythematosus.
Acute Myopia and Secondary Angle-Closure Glaucoma
Hydrochlorothiazide, a sulfonamide, can cause an idiosyncratic reaction, resulting in acute transient myopia and acute angle-closure glaucoma. Symptoms include acute onset of decreased visual acuity or ocular pain and typically occur within hours to weeks of drug initiation. Untreated acute angle-closure glaucoma can lead to permanent vision loss. The primary treatment is to discontinue hydrochlorothiazide as rapidly as possible. Prompt medical or surgical treatments may need to be considered if the intraocular pressure remains uncontrolled. Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy.
Serum Electrolyte Abnormalities
In clinical trials of Benazepril; Hydrochlorothiazide, the average change in serum potassium was near zero in subjects who received 5/6.25 mg or 20/12.5 mg, but the average subject who received 10/12.5 mg or 20/25 mg experienced a mild reduction in serum potassium, similar to that experienced by the average subject receiving the same dose of hydrochlorothiazide monotherapy.
Hydrochlorothiazide can cause hypokalemia and hyponatremia. Hypomagnesema can result in hypokalemia which appears difficult to treat despite potassium repletion. Drugs that inhibit the renin-angiotensin system can cause hyperkalemia. Monitor serum electrolytes periodically.
Hydrochlorothiazide may alter glucose tolerance and raise serum levels of cholesterol and triglycerides.
Hydrochlorothiazide may raise the serum uric acid level due to reduced clearance of uric acid and may cause or exacerbate hyperuricemia and precipitate gout in susceptible patients.
Thiazides decrease urinary calcium excretion and may cause mild elevation of serum calcium. Avoid using Benazepril; Hydrochlorothiazide in patients with hypercalcemia.
Presumably due to the inhibition of the degradation of endogenous bradykinin, persistent nonproductive cough has been reported with all ACE inhibitors, always resolving after discontinuation of therapy. ACE inhibitor-induced cough should be considered in the differential diagnosis of cough.
In patients undergoing surgery or during anesthesia with agents that produce hypotension, benazepril will block the angiotensin II formation that could otherwise occur secondary to compensatory renin release. Hypotension that occurs as a result of this mechanism can be corrected by volume expansion.
Information for Patients
Angioedema, including laryngeal edema, can occur at any time with treatment with ACE inhibitors. A patient receiving Benazepril; Hydrochlorothiazide should be told to report immediately any signs or symptoms suggesting angioedema and to take no more drug until after consulting with the prescribing physician.
Female patients of childbearing age should be told about the consequences of exposure to Benazepril; Hydrochlorothiazide during pregnancy. Discuss treatment options with women planning to become pregnant. Patients should be asked to report pregnancies to their physicians as soon as possible.
A patient receiving Benazepril; Hydrochlorothiazide should be cautioned that lightheadedness can occur, especially during the first days of therapy, and that it should be reported to the prescribing physician. The patient should be told that if syncope occurs, Benazepril; Hydrochlorothiazide should be discontinued until the physician has been consulted.
All patients should be cautioned that inadequate fluid intake, excessive perspiration, diarrhea, or vomiting can lead to an excessive fall in blood pressure, with the same consequences of lightheadedness and possible syncope.
A patient receiving Benazepril; Hydrochlorothiazide should be told not to use potassium supplements or salt substitutes containing potassium without consulting the prescribing physician.
Patients should be told to promptly report any indication of infection, which could be a sign of neutropenia.
The hydrochlorothiazide component of Benazepril; Hydrochlorothiazide may decrease serum PBI levels without signs of thyroid disturbance.
Therapy with Benazepril; Hydrochlorothiazide should be interrupted for a few days before carrying out tests of parathyroid function.
Interactions Common for Both Benazepril and Hydrochlorothiazide
Potassium Supplements and Potassium-Sparing Diuretics
Concomitant use with Benazepril; Hydrochlorothiazide may effect potassium levels. Monitor potassium periodically.
Renal clearance of lithium is reduced by thiazides and increase the risk of lithium toxicity. Increased serum lithium levels and symptoms of lithium toxicity have been reported in patients receiving ACE inhibitors during therapy with lithium. Monitor lithium levels when used concomitantly with Benazepril; Hydrochlorothiazide.
Dual Blockade of the Renin-Angiotensin System
Dual blockade of the RAS with angiotensin receptor blockers, ACE inhibitors, or aliskiren is associated with increased risks of hypotension, hyperkalemia, and changes in renal function (including acute renal failure) compared to monotherapy. Closely monitor blood pressure, renal function and electrolytes in patients on Benazepril; Hydrochlorothiazide and other agents that block the RAS.
Do not co-administer aliskiren with Benazepril; Hydrochlorothiazide in patients with diabetes. Avoid use of aliskiren with Benazepril; Hydrochlorothiazide in patients with renal impairment (GFR <60 ml/min).
NSAIDs and Cox-2 Selective Agents
In patients who are elderly, volume-depleted, or with compromised renal function, co-administration of NSAIDs, including selective COX-2 inhibitors, with ACE inhibitors, including benazepril, may result in deterioration of renal function, including possible acute renal failure. These effects are usually reversible. Monitor renal function periodically in patients receiving benazepril and NSAID therapy.
The antihypertensive effect of benazepril and hydrochlorothiazide may be attenuated by NSAIDs.
Benazepril has been used concomitantly with beta-adrenergic-blocking agents, calcium-blocking agents, cimetidine, diuretics, digoxin, hydralazine, and naproxen without evidence of clinically important adverse interactions. Other ACE inhibitors have had less than additive effects with beta-adrenergic blockers, presumably because drugs of both classes lower blood pressure by inhibiting parts of the renin-angiotensin system.
Interaction studies with warfarin and acenocoumarol have failed to identify any clinically important effects of benazepril on the serum concentrations or clinical effects of these anticoagulants.
Nitritoid reactions have been reported rarely in patients on therapy with injectable gold (sodium aurothiomalate) and concomitant ACE inhibitor therapy.
Ion exchange resins: Stagger the dosage of hydrochlorothiazide and ion exchange resins such that hydrochlorothiazide is administered at least 4 hours before or 4 to 6 hours after the administration of resins. Single doses of either cholestyramine or colestipol resins bind the hydrochlorothiazide and reduce its absorption from the gastrointestinal tract by up to 85% and 43%, respectively.
Digitalis Glycosides : Thiazide-induced hypokalemia or hypomagnesemia may predispose the patients to digoxin toxicity.
Skeletal Muscle Relaxants : Possible increased responsiveness to muscle relaxants such as curare derivatives.
Antidiabetic Agents : Dosage adjustment of antidiabetic drug may be required.
Antineoplastic Agents (e.g., cyclophosphamide, methotrexate): Concomitant use of thiazide diuretics may reduce renal excretion of cytotoxic agents and enhance their myelosuppressive effects.
Drugs That Alter Gastrointestinal Motility : The bioavailability of thiazide-type diuretics may be increased by anticholinergic agents (e.g., atropine, biperiden), apparently due to a decrease in gastrointestinal motility and the stomach emptying rate. Conversely, pro-kinetic drugs may decrease the bioavailability of thiazide diuretics.
Cyclosporin : Concomitant treatment with diuretics may increase the risk of hyperuricaemia and gout-type complications.
Alcohol, Barbiturates or Narcotics : Concomitant administration of thiazide diuretics with alcohol, barbiturates, or narcotics may potentiate orthostatic hypotension.
Pressor Amines : Hydrochlorothiazide may reduce the response to pressor amines such as noradrenaline but the clinical significance of this effect is not sufficient to preclude their use.
Non-Clinical Safety Data
Carcinogenesis, Mutagenicity, Fertility
No evidence of carcinogenicity was found when benazepril was given to rats and mice for 104 weeks at doses up to 150 mg/kg/day. On a body-surface-area basis, this dose is 18 times and 9 times (mice) the maximum recommended human dose. No mutagenic activity was detected in the Ames test in bacteria (with or without metabolic activation), in an in vitro test for forward mutations in cultured mammalian cells, or in a nucleus anomaly test. At doses of 50 mg/kg/day to 500 mg/kg/day (6 to 61 times the maximum recommended dose on a body-surface-area basis), benazepril had no adverse effect on the reproductive performance of male and female rats.
Under the auspices of the National Toxicology Program, rats and mice received hydrochlorothiazide in their feed for two years, at doses up to 600 mg/kg/day in mice and up to 100 mg/kg/day in rats. These studies uncovered no evidence of a carcinogenic potential of hydrochlorothiazide in rats or female mice, but there was equivocal evidence of hepatocarcinogenicity in male mice. Hydrochlorothiazide was not genotoxic in in vitro assays using strains TA 98, TA 100, TA 1535, TA 1537, and TA 1538 of Salmonella typhimurium (the Ames test); in the Chinese Hamster Ovary (CHO) test for chromosomal aberrations; or in in vivo assays using mouse germinal cell chromosomes, Chinese hamster bone marrow chromosomes, and the Drosophila sex-linked recessive lethal trait gene. Positive test results were obtained in the in vitro CHO Sister Chromatid Exchange (clastogenicity) test and in the Mouse Lymphoma Cell (mutagenicity) assays, using concentrations of hydrochlorothiazide of 43 mcg/mL to 1300 mcg/mL. Positive test results were also obtained in the Aspergillus nidulans nondisjunction assay, using an unspecified concentration of hydrochlorothiazide.
There are no human fertility data for hydrochlorothiazide. In animal studies, benazepril and hydrochlorothiazide alone or in combination had no effect on fertility and conception (see PRECAUTIONS, Non-Clinical Safety Data).
Use in Specific Populations
Minimal amounts of unchanged benazepril and benazeprilat are excreted into the breast milk of lactating women treated with benazepril, so that a newborn child ingesting nothing but breast milk would receive less than 0.1% of the maternal doses of benazepril and benazeprilat. Thiazides, on the other hand, are definitely excreted into breast milk. Because of the potential for serious adverse reactions in nursing infants from hydrochlorothiazide and the unknown effects of benazepril in infants, a decision should be made whether to discontinue nursing or to discontinue Benazepril; Hydrochlorothiazide, taking into account the importance of the drug to the mother.
Of the total number of patients who received Benazepril; Hydrochlorothiazide in U.S. clinical studies of Benazepril; Hydrochlorothiazide, 19% were 65 or older while about 1.5% were 75 or older. Overall differences in effectiveness or safety were not observed between these patients and younger patients.
A limited amount of data suggests that the systemic clearance of hydrochlorothiazide is reduced in both healthy and hypertensive elderly subjects compared to young healthy volunteers.
Neonates with a history of in utero exposure to Benazepril; Hydrochlorothiazide:
If oliguria or hypotension occurs, direct attention toward support of blood pressure and renal perfusion. Exchange transfusions or dialysis may be required as a means of reversing hypotension and/or substituting for disordered renal function. Benazepril, which crosses the placenta, can theoretically be removed from the neonatal circulation by these means; there are occasional reports of benefit from these maneuvers with another ACE inhibitor, but experience is limited.
Safety and effectiveness in pediatric patients have not been established.
Safety and effectiveness of Benazepril; Hydrochlorothiazide in patients with severe renal impairment have not been established. No dose adjustment is required in patients with mild (CrCL 60-90 ml/min) or moderate (CrCL 30-60) renal impairment.
No adjustment of the initial dose is required for patients with mild to moderate hepatic impairment (see CLINICAL PHARMACOLOGY ).
Minor alterations of fluid and electrolyte imbalance may precipitate hepatic coma in patients with impaired hepatic function or progressive liver disease.
Benazepril; Hydrochlorothiazide has been evaluated for safety in over 2,500 patients with hypertension; over 500 of these patients were treated for at least 6 months, and over 200 were treated for more than 1 year.
The reported side effects were generally mild and transient, and there was no relationship between side effects and age, sex, race, or duration of therapy. Discontinuation of therapy due to side effects was required in approximately 7% of U.S. patients treated with Benazepril; Hydrochlorothiazide and in 4% of patients treated with placebo.
The most common reasons for discontinuation of therapy with Benazepril; Hydrochlorothiazide in U.S. studies were cough, “dizziness” (1%), headache (0.6%), and fatigue (0.6%).
The side effects considered possibly or probably related to study drug that occurred in U.S. placebo-controlled trials in more than 1% of patients treated with Benazepril; Hydrochlorothiazide are shown in the table below.
Other side effects considered possibly or probably related to study drug that occurred in U.S. placebo-controlled trials in 0.3% to 1% of patients treated with Benazepril; Hydrochlorothiazide were the following:
Cardiovascular: Palpitations, flushing.
Gastrointestinal: Vomiting, diarrhea, dyspepsia, anorexia, and constipation.
Neurologic and Psychiatric: Insomnia, nervousness, paresthesia, libido decrease, dry mouth, taste perversion, and tinnitus.
Dermatologic: Rash and sweating.
Other: Urinary frequency, arthralgia, myalgia, asthenia, and pain (including chest pain and abdominal pain).
Other adverse experiences reported in 0.3% or more of Benazepril; Hydrochlorothiazide patients in U.S. controlled clinical trials, and rarer events seen in post-marketing experience, were the following; asterisked entries occurred in more than 1% of patients (in some, a causal relationship to Benazepril; Hydrochlorothiazide is uncertain):
Cardiovascular: Syncope, peripheral vascular disorder, and tachycardia.
Body as a Whole: Infection, back pain*, flu syndrome*, fever, chills, and neck pain.
Dermatologic: Photosensitivity and pruritus.
Gastrointestinal: Gastroenteritis, flatulence, and tooth disorder.
Neurologic and Psychiatric: Hypesthesia, abnormal vision, abnormal dreams, and retinal disorder.
Respiratory: Upper respiratory infection*, epistaxis, bronchitis, rhinitis*, sinusitis*, and voice alteration.
Other: Conjunctivitis, arthritis, urinary tract infection, alopecia, and urinary frequency*.
The following adverse reactions have been identified during post-approval use of either benazepril or hydrochlorothiazide. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or establish a causal relationship to drug exposure:
Benazepril Stevens-Johnson syndrome, pancreatitis, hemolytic anemia, pemphigus, and thrombocytopenia, eosinophilic pneumonitis.
Digestive : Pancreatitis, small bowel angioedema, jaundice, sialadenitis, vomiting, diarrhea, cramping, nausea, gastric irritation, constipation, and anorexia.
Neurologic: Vertigo, lightheadedness, transient blurred vision, headache, paresthesia, xanthopsia, weakness, and restlessness.
Musculoskeletal: Muscle spasm.
Hematologic: Aplastic anemia, agranulocytosis, leukopenia, neutropenia and thrombocytopenia.
Metabolic: Hyperglycemia, glycosuria, and hyperuricemia, pyrexia, asthenia, parathyroid gland changes with hypercalcemia and hypophosphatemia.
Hypersensitivity: Anaphylactoid reactions, necrotizing angiitis, respiratory distress (including pneumonitis and pulmonary edema), purpura, urticaria, rash, and photosensitivity.
Skin: Erythema multiforme including Stevens-Johnson syndrome, and exfoliative dermatitis including toxic epidermal necrolysis.
Clinical Laboratory Test Findings
Creatinine and BUN
Minor reversible increases in serum creatinine and BUN were observed in patients with essential hypertension treated with Benazepril; Hydrochlorothiazide. Such increases occurred most frequently in patients with renal artery stenosis.
No specific information is available on the treatment of overdosage with Benazepril; Hydrochlorothiazide; treatment should be symptomatic and supportive. Therapy with Benazepril; Hydrochlorothiazide should be discontinued, and the patient should be observed. Dehydration, electrolyte imbalance, and hypotension should be treated by established procedures.
Single oral doses of 1 g/kg of benazepril caused reduced activity in mice, and doses of 3 g/kg were associated with significant lethality. Reduction of activity in rats was not seen until they had received doses of 5 g/kg, and doses of 6 g/kg were not lethal. In single-dose studies of hydrochlorothiazide, most rats survived doses up to 2.75 g/kg.
Data from human overdoses of benazepril are scanty, but the most common manifestation of human benazepril overdosage is likely to be hypotension. In human hydrochlorothiazide overdose, the most common signs and symptoms observed have been those of dehydration and electrolyte depletion (hypokalemia, hypochloremia, hyponatremia). If digitalis has also been administered, hypokalemia may accentuate cardiac arrhythmias.
Laboratory determinations of serum levels of benazepril and its metabolites are not widely available, and such determinations have, in any event, no established role in the management of benazepril overdose.
No data are available to suggest physiological maneuvers (e.g., maneuvers to change the pH of the urine) that might accelerate elimination of benazepril and its metabolites. Benazeprilat is only slightly dialyzable, but dialysis might be considered in overdosed patients with severely impaired renal function.
Angiotensin II could presumably serve as a specific antagonist-antidote in the setting of benazepril overdose, but angiotensin II is essentially unavailable outside of scattered research facilities. Because the hypotensive effect of benazepril is achieved through vasodilation and effective hypovolemia, it is reasonable to treat benazepril overdose by infusion of normal saline solution.
DOSAGE AND ADMINISTRATION
Dose once daily. The dosage may then be increased after 2 to 3 weeks as needed to help achieve blood pressure goals. The maximum recommended dose is 20 mg/25 mg.
A patient whose blood pressure is not adequately controlled with benazepril alone or with hydrochlorothiazide alone may be switched to combination therapy with Benazepril; Hydrochlorothiazide tablets. The usual recommended starting dose is 10 mg/12.5 mg once daily to control blood pressure.
The combination may be substituted for the titrated individual components.
Benazepril; Hydrochlorothiazide Tablets, for oral administration, are available as:
5 mg/6.25 mg: White to off-white, oblong, film-coated tablets, debossed "E 124" on one side and scored on the other side and supplied as:
NDC 0185-0124-01 bottles of 100
10 mg/12.5 mg: Pink, oblong, film-coated tablets, debossed "E 204" on one side and scored on the other side and supplied as:
NDC 0185-0204-01 bottles of 100
20 mg/12.5 mg: Lavender, oblong, film-coated tablets, debossed "E 211" on one side and scored on the other side and supplied as:
NDC 0185-0211-01 bottles of 100
20 mg/25 mg: Maroon, oblong, film-coated tablets, debossed "E 277" on one side and scored on the other side and supplied as:
NDC 0185-0277-01 bottles of 100
Each strength is supplied in bottles that contain a desiccant.
Store at 20º to 25ºC (68º to 77ºF). Protect from light and moisture.
Dispense in a tight, light-resistant container as defined in the USP with a child-resistant closure, as required.
To report SUSPECTED ADVERSE REACTIONS, contact Sandoz Inc. at 1-800-525-8747 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
Princeton, NJ 08540
Benazepril/Hctz 20mg/25mg Tablet
Chemical Structure 1 Chemical Structure 2
Benazepril; Hydrochlorothiazide pharmaceutical active ingredients containing related brand and generic drugs:
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Benazepril; Hydrochlorothiazide available forms, composition, doses:
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Benazepril; Hydrochlorothiazide destination | category:
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Benazepril; Hydrochlorothiazide Anatomical Therapeutic Chemical codes:
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Benazepril; Hydrochlorothiazide pharmaceutical companies:
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Frequently asked QuestionsCan i drive or operate heavy machine after consuming Benazepril; Hydrochlorothiazide?
Depending on the reaction of the Benazepril; Hydrochlorothiazide after taken, if you are feeling dizziness, drowsiness or any weakness as a reaction on your body, Then consider Benazepril; Hydrochlorothiazide not safe to drive or operate heavy machine after consumption. Meaning that, do not drive or operate heavy duty machines after taking the capsule if the capsule has a strange reaction on your body like dizziness, drowsiness. As prescribed by a pharmacist, it is dangerous to take alcohol while taking medicines as it exposed patients to drowsiness and health risk. Please take note of such effect most especially when taking Primosa capsule. It's advisable to consult your doctor on time for a proper recommendation and medical consultations.Is Benazepril; Hydrochlorothiazide addictive or habit forming?
Medicines are not designed with the mind of creating an addiction or abuse on the health of the users. Addictive Medicine is categorically called Controlled substances by the government. For instance, Schedule H or X in India and schedule II-V in the US are controlled substances.
Please consult the medicine instruction manual on how to use and ensure it is not a controlled substance.In conclusion, self medication is a killer to your health. Consult your doctor for a proper prescription, recommendation, and guidiance.
ReviewsDrugs.com conducted a study on Benazepril; Hydrochlorothiazide, and the result of the survey is set out below. It is noteworthy that the product of the survey is based on the perception and impressions of the visitors of the website as well as the views of Benazepril; Hydrochlorothiazide consumers. We, as a result of this, advice that you do not base your therapeutic or medical decisions on this result, but rather consult your certified medical experts for their recommendations.
The information was verified by Dr. Arunabha Ray, MD Pharmacology