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Components:
Enalapril, Hydrochlorothiazide
Method of action:
Agents Acting In The Renin-Angiotensin System, Antihypertensive, Diuretic, Hypotensive
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Medically reviewed by Kovalenko Svetlana Olegovna, PharmD. Last updated on 2019.10.20

Name of the medicinal product

Acetensil Plus

Qualitative and quantitative composition

Enalapril; Hydrochlorothiazide

Therapeutic indications

The information provided in Therapeutic indications of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Therapeutic indications in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Acetensil Plus is indicated for the treatment of mild to moderate hypertension in patients who have been stabilised on the individual components given in the same proportions.

Dosage (Posology) and method of administration

The information provided in Dosage (Posology) and method of administration of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Dosage (Posology) and method of administration in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Posology

The dosage of Acetensil Plus should be determined primarily by the experience with the enalapril maleate component.

Adults

Essential hypertension

The usual dosage is one tablet, taken once daily. If necessary, the dosage may be increased to two tablets, taken once daily.

Prior diuretic therapy: symptomatic hypotension may occur following the initial dose of Acetensil Plus; this is more likely in patients who are volume and/or salt depleted as a result of prior diuretic therapy. The diuretic therapy should be discontinued for 2-3 days prior to initiation of therapy with Acetensil Plus.

Dosage in renal insufficiency

Thiazides may not be appropriate diuretics for use in patients with renal impairment and are ineffective at creatinine clearance values of 30 ml/min or below (i.e. moderate or severe renal insufficiency).

In patients with creatinine clearance of >30 and <80 ml/min, Acetensil Plus should be used only after titration of the individual components.

Use in the elderly

In clinical studies the efficacy and tolerability of enalapril maleate and hydrochlorothiazide, administered concomitantly, were similar in both elderly and younger hypertensive patients.

Paediatric population

Safety and effectiveness in children have not been established.

Method of administration

Oral use.

Contraindications

The information provided in Contraindications of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Contraindications in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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- Severe renal impairment (creatinine clearance ≤30 ml/min).

- Anuria.

- History of angioneurotic oedema associated with previous ACE-inhibitor therapy.

- Hereditary or idiopathic angiooedema.

- Hypersensitivity to sulfonamide-derived drugs.

- Second and third trimesters of pregnancy.

- Severe hepatic impairment.

- Stenosis of the renal arteries

- The concomitant use of Acetensil Plus with aliskiren-containing products is contraindicated in patients with diabetes mellitus or renal impairment (GFR <60 ml/min/1.73m2).

Special warnings and precautions for use

The information provided in Special warnings and precautions for use of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Special warnings and precautions for use in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Enalapril Maleate - Hydrochlorothiazide

Hypotension and Electrolyte Fluid Imbalance

Symptomatic hypotension is rarely seen in uncomplicated hypertensive patients. In hypertensive patients receiving Acetensil Plus, symptomatic hypotension is more likely to occur if the patient has been volume - depleted, e.g., by diuretic therapy, dietary salt restriction, diarrhoea or vomiting. Regular determination of serum electrolytes should be performed at appropriate intervals in such patients. Special attention should be paid to patients with ischemic heart or cerebrovascular disease in whom an excessive fall in blood pressure could result in a myocardial infarction or cerebrovascular accident. In hypertensive patients with heart failure, with or without associated renal insufficiency, symptomatic hypotension has been observed. This is most likely to occur in those patients with more severe degrees of heart failure, as reflected by the use of high doses of loop diuretics, hyponatraemia or functional renal impairment. In these patients, therapy should be started under medical supervision and the patients should be followed closely whenever the dose of Acetensil Plus and/or diuretic is adjusted. Similar considerations may apply to patients with ischaemic heart or cerebrovascular disease in whom an excessive fall in blood pressure could result in a myocardial infarction or cerebrovascular accident.

If hypotension occurs, the patient should be placed in the supine position and, if necessary, should receive an intravenous infusion of normal saline. A transient hypotensive response is not a contra-indication to further doses, which can be given usually without difficulty once the blood pressure has increased after volume expansion.

In some patients with heart failure who have normal or low blood pressure, additional lowering of systemic blood pressure may occur with Acetensil Plus. This effect is anticipated, and usually is not a reason to discontinue treatment. If hypotension becomes symptomatic, a reduction of dose and/or discontinuation of the diuretic and/or Acetensil Plus may be necessary.

Renal Function Impairment

Renal failure has been reported in association with enalapril and has been mainly in patients with severe heart failure or underlying renal disease, including renal artery stenosis. If recognised promptly and treated appropriately, renal failure when associated with therapy with enalapril is usually reversible.

Acetensil Plus should not be administered to patients with renal insufficiency (creatinine clearance <80 ml/min. and >30 ml/min.) until titration of enalapril has shown the need for the dose present in this formulation.

Some hypertensive patients with no apparent pre-existing renal disease have developed increases in blood urea and creatinine when enalapril has been given concurrently with a diuretic (see Special warnings and precautions for use, Enalapril Maleate, Renal Function Impairment; Hydrochlorothiazide, Renal Function Impairment in section 4.4).).

Dual blockade of the renin-angiotensin-aldosterone system (RAAS)

There is evidence that the concomitant use of ACE-inhibitors, angiotensin II receptor blockers or aliskiren increases the risk of hypotension, hyperkalaemia, and decreased renal function (including acute renal failure). Dual blockade of RAAS through the combined use of ACE-inhibitors, angiotensin II receptor blockers or aliskiren is therefore not recommended.

If dual blockade therapy is considered absolutely necessary, this should only occur under specialist supervision and subject to frequent close monitoring of renal function, electrolytes and blood pressure.

ACE-inhibitors and angiotensin II receptor blockers should not be used concomitantly in patients with diabetic nephropathy.

Hyperkalaemia

The combination of enalapril and a low-dose diuretic cannot exclude the possibility of a hyperkalaemia to occur (see Special warnings and precautions for use, Enalapril Maleate, Hyperkalaemia in section 4.4).

Lithium

The combination of lithium with enalapril and diuretic agents is generally not recommended.

Lactose

Acetensil Plus contains less than 200 mg of lactose per tablet. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicinal product.

Paediatric population

Safety and efficacy in children has not been established.

Enalapril Maleate

AorticStenosis/Hypertrophic Cardiomyopathy

As with all vasodilators, ACE inhibitors should be given with caution in patients with left ventricular valvular and outflow tract obstruction and avoided in cases of cardiogenic shock and haemodynamically significant obstruction.

Renal Function Impairment

Renal failure has been reported in association with enalapril and has been mainly in patients with severe heart failure or underlying renal disease, including renal artery stenosis.Special warnings and precautions for use, Enalapril Maleate-Hydrochlorothiazide, Renal Function Impairment; Hydrochlorothiazide, Renal Function Impairment in section 4.4).

Renovascular Hypertension

There is an increased risk of hypotension and renal insufficiency when patients with bilateral renal artery stenosis or stenosis of the artery to a single functioning kidney are treated with ACE inhibitors. Loss of renal function may occur with only mild changes in serum creatinine. In these patients, therapy should be initiated under close medical supervision with low doses, careful titration, and monitoring of renal function.

Haemodialysis Patients

The use of enalapril is not indicated in patients requiring dialysis for renal failure. Anaphylactoid reactions have been reported in patients dialysed with high-flux membranes (e.g., AN 69®) and treated concomitantly with an ACE inhibitor. In these patients consideration should be given to using a different type of dialysis membrane or a different class of antihypertensive agent.

Kidney Transplantation

There is no experience regarding the administration of enalapril in patients with a recent kidney transplantation. Treatment with enalapril is therefore not recommended.

Hepatic failure

Rarely, ACE inhibitors have been associated with a syndrome that starts with cholestatic jaundice or hepatitis and progresses to fulminant hepatic necrosis and (sometimes) death.).

Neutropenia/Agranulocytosis

Neutropenia/agranulocytosis, thrombocytopenia and anaemia have been reported in patients receiving ACE inhibitors. In patients with normal renal function and no other complicating factors, neutropenia occurs rarely. Enalapril should be used with extreme caution in patients with collagen vascular disease, immunosuppressant therapy, treatment with allopurinol or procainamide, or a combination of these complicating factors, especially if there is pre-existing impaired renal function. Some of these patients developed serious infections which in a few instances did not respond to intensive antibiotic therapy. If enalapril is used in such patients, periodic monitoring of white blood cell counts is advised and patients should be instructed to report any sign of infection.

Hyperkalaemia

Elevations in serum potassium have been observed in some patients treated with ACE inhibitors, including enalapril.5).

Hypoglycaemia

5).

Hypersensitivity/Angioneurotic Oedema

Angioneurotic oedema of the face, extremities, lips, tongue, glottis and/or larynx has been reported in patients treated with angiotensin converting enzyme inhibitors, including enalapril maleate. This may occur at any time during treatment. In such cases, Acetensil Plus should be discontinued promptly and appropriate monitoring should be instituted to ensure complete resolution of symptoms prior to dismissing the patient. Even in those instances where swelling of only the tongue is involved, without respiratory distress, patients may require prolonged observation since treatment with antihistamines and corticosteroids may not be sufficient.

Very rarely, fatalities have been reported due to angiooedema associated with laryngeal oedema or tongue oedema. Patients with involvement of the tongue, glottis or larynx are likely to experience airway obstruction, especially those with a history of airway surgery. Where there is involvement of the tongue, glottis or larynx, likely to cause airway obstruction, appropriate therapy, which may include subcutaneous epinephrine solution 1:1000 (0.3 ml to 0.5 ml) and/or measures to ensure a patent airway, should be administered promptly.

Black patients receiving ACE inhibitors have been reported to have a higher incidence of angioedema compared to Whites. However, in general it appears that Blacks have an increased risk for angioedema.

Patients with a history of angioedema unrelated to ACE inhibitor therapy may be at increased risk of angioedema while receiving an ACE inhibitor. (see also section 4.3).

Patients receiving coadministration of ACE inhibitor and mTOR (mammalian target of rapamycin) inhibitor (e.g., temsirolimus, sirolimus, everolimus) therapy may be at increased risk for angioedema.

Anaphylactoid Reactions during Hymenoptera Desensitisation

Rarely, patients receiving ACE inhibitors during desensitisation with hymenoptera venom have experienced life-threatening anaphylactoid reactions. These reactions were avoided by temporarily withholding ACE inhibitor therapy prior to each desensitisation.

Anaphylactoid Reactions during LDL-Apheresis

Rarely, patients receiving ACE inhibitors during low density lipoprotein (LDL)-apheresis with dextran sulfate have experienced life-threatening anaphylactic reactions. These reactions were avoided by temporarily withholding ACE-inhibitor therapy prior to each apheresis.

Cough

Cough has been reported with the use of ACE inhibitors. Characteristically, the cough is non-productive, persistent and resolves after discontinuation of therapy. ACE inhibitor-induced cough should be considered as part of the differential diagnosis of cough.

Surgery/Anaesthesia

Enalapril blocks angiotensin II formation and therefore impairs the ability of patients undergoing major surgery or anaesthesia with agents that produce hypotension to compensate via the renin-angiotensin system. Hypotension which occurs due to this mechanism can be corrected by volume expansion.

Pregnancy

ACE inhibitors should not be initiated during pregnancy. Unless continued ACE inhibitor therapy is considered essential, patients planning pregnancy should be changed to alternative antihypertensive treatments which have an established safety profile for use in pregnancy. When pregnancy is diagnosed, treatment with ACE inhibitors should be stopped immediately, and, if appropriate, alternative therapy should be started.

Ethnic Differences

As with other angiotensin converting enzyme inhibitors, enalapril is apparently less effective in lowering blood pressure in black people than in non-blacks, possibly because of a higher prevalence of low-renin states in the black hypertensive population.

Hydrochlorothiazide

Renal Function Impairment

Thiazides may not be appropriate diuretics for use in patients with renal impairment and are ineffective at creatinine clearance values of 30 ml/min or below (i.e., moderate or severe renal insufficiency) (see section 4.2 and Special warnings and precautions for use, Enalapril Maleate-Hydrochlorothiazide, Renal Function Impairment; Enalapril Maleate, Renal Function Impairment in section 4.4).

Acetensil Plus should not be administered to patients with renal insufficiency (creatinine clearance ≤80 ml/min) until titration of the individual components has shown the need for the doses present in the combination tablet.

Hepatic Disease

Thiazides should be used with caution in patients with impaired hepatic function or progressive liver disease, since minor alterations of fluid and electrolyte balance may precipitate hepatic coma (see Special warnings and precautions for use, Enalapril Maleate, Hepatic Failure in section 4.4).

Metabolic and Endocrine Effects

Thiazide therapy may impair glucose tolerance.). Thaizides may decrease serum sodium, magnesium and potassium levels.

Increases in cholesterol and triglyceride levels may be associated with thiazide diuretic therapy; however, at the 12.5 mg dose of hydrochlorothiazide contained in Acetensil Plus, minimal or no effect was reported. In addition, in clinical studies with 6 mg of hydrochlorothiazide no clinically significant effect on glucose, cholesterol, triglycerides, sodium, magnesium or potassium was reported.

Thiazides may decrease urinary calcium excretion and cause an intermittent and slight elevation of serum calcium in the absence of known disorders of calcium metabolism. Marked hypercalcaemia may be evidence of latent hyperparathyroidism. Thiazides should be discontinued before testing parathyroid function.

Thiazide therapy may precipitate hyperuricaemia and/or gout in certain patients. This effect on hyperuricemia appears to be dose-related. In addition enalapril may increase urinary uric acid and thus may attenuate the hyperuricaemic effect of hydrochlorothiazide.

As for any patient receiving diuretic therapy, periodic determination of serum electrolytes should be performed at appropriate intervals.

Thiazides (including hydrochlorothiazide) can cause fluid or electrolyte imbalance (hypokalaemia, hyponatraemia, and hypochloraemic alkalosis). Warning signs of fluid or electrolyte imbalance are xerostomia, thirst, weakness, lethargy, somnolence, restlessness, muscle pain or cramps, muscular fatigue, hypotension, oliguria, tachycardia, and gastro-intestinal disturbances such as nausea and vomiting.

Although hypokalaemia may develop during use of thiazide diuretics, concurrent therapy with enalapril may reduce diuretic-induced hypokalaemia. The risk of hypokalaemia is greatest in patients with cirrhosis of the liver, in patients experiencing brisk diuresis, in patients with inadequate oral intake of electrolytes and in patients receiving concomitant therapy with corticosteroids or ACTH.

Hyponatraemia may occur in oedematous patients in hot weather. Chloride deficit is generally mild and does not usually require treatment.

Thiazides may have been shown to increase the urinary excretion of magnesium, which may result in hypomagnesemia.

Anti-doping test

Hydrochlorothiazide contained in this product can produce a positive analytic result in an anti-doping test.

Hypersensitivity

In patients receiving thiazides, sensitivity reactions may occur with or without a history of allergy and bronchial asthma. Exacerbation or activation of systemic lupus erythematosus has been reported with the use of thiazides.

Effects on ability to drive and use machines

The information provided in Effects on ability to drive and use machines of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Effects on ability to drive and use machines in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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When driving vehicles or operating machines it should be taken into account that occasionally dizziness or weariness may occur.

Undesirable effects

The information provided in Undesirable effects of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Undesirable effects in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Acetensil Plus is usually well-tolerated. In clinical studies, side effects have usually been mild and transient, and in most instances have not required interruption of therapy.

The most common side effects reported during clinical study with Acetensil Plus were headache and cough.

The following undesirable side effects have been reported for Acetensil Plus, enalapril alone or hydrochlorothiazide alone either during clinical studies or after the drug was marketed.

Table 1. Undesirable effects of Acetensil Plus

System organ class

Very common (>1/10)

Common (>1/100 to <1/10)

Uncommon (>1/1,000 to <1/100)

Rare (>1/10,000 to <1/1,000)

Very rare (<1/10,000)

Not known (cannot be estimated from the available data)

Blood and lymphatic system disorders

Anaemia (including aplastic and haemolytic)

Neutropenia, decreases in haemoglobin, deacreases in haematocrit, thrombocytopenia, agranulocytosis, bone marrow depression, leukopenia, pancytopenia, lymphadenopathy, autoimmune diseases

Endocrine disorders

Syndrome of inappropriate antidiuretic hormone secretion (SIADH)

Metabolism and nutrition disorders

Hypokalaemia, increase of cholesterol, increase of triglycerides, hyperuricaemia

Hypoglycaemia , hypomagnesaemia, gout**

Increase in blood glucose

Hypercalcaemia

Nervous system and psychiatric disorders

Headache, depression, syncope, taste alteration

Confusion, somnolence, insomnia, nervousness, paresthesia, vertigo, decreased libido**

Dream abnormality, sleep disorders, paresis (due to hypokalaemia)

Eye disorders

Blurred vision

Ear and labyrinth disorders

Tinnitus

Cardiac and vascular disorders

Dizziness

Hypotension, orthostatic hypotension, rhythm disturbances, angina pectoris, tachycardia

Flushing, palpitations, myocardial infarction or cerebrovascular accident*, possibly secondary to excessive hypotension in high risk patients

Raynaud's phenomenon

Respiratory, thoracic, and mediastinal disorders

Cough

Dyspnoea

Rhinorrhoea, sore throat and hoarseness, bronchospasm/asthma

Pulmonary infiltrates, respiratory distress (including pneumonitis and pulmonary oedema), rhinitis, allergic alveolitis/eosinophilic pneumonia

Gastrointestinal disorders

Nausea

Diarrhoea, abdominal pain

Ileus, pancreatitis, vomiting, dyspepsia, constipation, anorexia, gastric irritations, dry mouth, peptic ulcer, flatulence**

Stomatitis/aphthous ulcerations, glossitis

Intestinal angiooedema

Hepatobiliary disorders

Hepatic failure, hepatic necrosis (may be fatal), hepatitis - either hepatocellular or cholestatic, jaundice, cholecystitis (in particular in patients with pre-existing cholelithiasis)

Skin and subcutaneous tissue disorders

Rash (exanthema) hypersensitivity/ angioneurotic oedema: angioneurotic oedema of the face, extremities, lips, tongue, glottis and/or larynx has been reported

Diaphoresis, pruritus, urticaria, alopecia

Erythema multiforme, Stevens-Johnson syndrome, exfoliative dermatitis, toxic epidermal necrolysis, purpura, cutaneous lupus erythematosus, erythroderma, pemphigus

A symptom complex has been reported which may include some or all of the following: fever, serositis, vasculitis, myalgia/myositis, arthralgia/arthritis, a positive ANA, elevated ESR, eosinophilia, and leucocytosis. Rash, photosensitivity or other dermatologic manifestations may occur.

Musculoskeletal, connective tissue, and bone disorders

Muscle crampsâ€

Arthralgia**

Renal and urinary  disorders

Renal dysfunction, renal failure, proteinuria

Oliguria, interstitial nephritis

Reproductive system and breast disorders

Impotence

Gynecomastia

General disorders and administration site conditions

Asthenia

Chest pain, fatigue

Malaise, fever

Investigations

Hyperkalaemia, increases in serum creatinine

Increases in blood urea, hyponatremia

Elevations of liver enzymes, elevations of serum bilirubin

* Incidence rates were comparable to those in the placebo and active control groups in the clinical trials.

** Only seen with doses of hydrochlorothiazide 12.5 mg and 25 mg

†The frequency of muscle cramps as common pertains to doses of hydrochlorothiazide 12.5 mg and 25 mg, whereas, the frequency of the event is uncommon as it pertains to 6 mg doses of hydrochlorothiazide.

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard

Overdose

The information provided in Overdose of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Overdose in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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No specific information is available on the treatment of overdosage with Acetensil Plus. Treatment is symptomatic and supportive. Therapy with Acetensil Plus should be discontinued and the patient observed closely. Suggested measures include induction of emesis, administration of activated charcoal, and administration of a laxative if ingestion is recent, and correction of dehydration, electrolyte imbalance and hypotension by established procedures.

Enalapril Maleate

The most prominent features of overdosage reported to date are marked hypotension, beginning some six hours after ingestion of tablets, concomitant with blockade of the renin-angiotensin system, and stupor. Symptoms associated with overdosage of ACE inhibitors may include circulatory shock, electrolyte disturbances, renal failure, hyperventilation, tachycardia, palpitations, bradycardia, dizziness, anxiety, and cough. Serum enalaprilat levels 100- and 200-fold higher than usually seen after therapeutic doses have been reported after ingestion of 300 mg and 440 mg of enalapril maleate, respectively.

The recommended treatment of overdosage is intravenous infusion of normal saline solution. If hypotension occurs, the patient should be placed in the shock position. If available, treatment with angiotensin II infusion and/or intravenous catecholamines may also be considered. If ingestion is recent, take measures aimed at eliminating enalapril maleate (e.g., emesis, gastric lavage, administration of absorbents, and sodium sulfate). Enalaprilat may be removed from the general circulation by haemodialysis. Pacemaker therapy is indicated for therapy-resistant bradycardia. Vital signs, serum electrolytes and creatinine concentrations should be monitored continuously.

Hydrochlorothiazide

The most common signs and symptoms observed are those caused by electrolyte depletion (hypokalaemia, hypochloraemia, hyponatraemia) and dehydration resulting from excessive diuresis. If digitalis has also been administered, hypokalaemia may accentuate cardiac arrhythmias.

Pharmacodynamic properties

The information provided in Pharmacodynamic properties of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Pharmacodynamic properties in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Pharmacotherapeutic group: enalapril and diuretics, ATC code C09 BA02.

Enalapril maleate

Angiotensin-converting enzyme (ACE) is a peptidyl dipeptidase which catalyses the conversion of angiotensin I to the pressor substance angiotensin II. After absorption, enalapril is hydrolysed to enalaprilat, which inhibits ACE, which leads to increased plasma renin activity (due to removal of negative feedback on renin release), and decreased aldosterone secretion.

ACE is identical to kininase II. Thus enalapril may also block the degradation of bradykinin, a potential vasodepressor peptide. However, the role that this plays in the therapeutic effects of enalapril remains to be elucidated.

Mechanism of Action

While the mechanism through which enalapril lowers blood pressure is believed to be primarily suppression of the renin-angiotensin-aldosterone system, which plays a major role in the regulation of blood pressure, enalapril is antihypertensive even in patients with low-renin hypertension.

Enalapril maleate - hydrochlorothiazide

Hydrochlorothiazide is a diuretic and antihypertensive agent which increases plasma renin activity. Although enalapril alone is antihypertensive even in patients with low-renin hypertension, concomitant administration of hydrochlorothiazide in these patients leads to greater reduction of blood pressure.

Dual Blockade

Two large randomised, controlled trials (ONTARGET (ONgoing Telmisartan Alone and in combination with Ramipril Global Endpoint Trial), VA NEPHRON-D (The Veterans Affairs Nephropathy in Diabetes)) have examined the use of the combination of an ACE-inhibitor with an angiotensin II receptor blocker.

ONTARGET was a study conducted in patients with a history of cardiovascular or cerebrovascular disease, or type 2 diabetes mellitus accompanied by evidence of end-organ damage. VA NEPHRON-D was a study in patients with type 2 diabetes mellitus and diabetic nephropathy.

These studies have shown no significant beneficial effect on renal and/or cardiovascular outcomes and mortality, while an increased risk of hyperkalaemia, acute kidney injury and/or hypotension as compared to monotherapy was observed. Given their similar pharmacodynamic properties, these results are also relevant for other ACE-inhibitors and angiotensin II receptor blockers.

ACE-inhibitors and angiotensin II receptor blockers should therefore not be used concomitantly in patients with diabetic nephropathy.

ALTITUDE (Aliskiren Trial in Type 2 Diabetes Using Cardiovascular and Renal Disease Endpoints) was a study designed to test the benefit of adding aliskiren to a standard therapy of an ACE-inhibitor or an angiotensin II receptor blocker in patients with type 2 diabetes mellitus and chronic kidney disease, cardiovascular disease, or both. The study was terminated early because of an increased risk of adverse outcomes. Cardiovascular death and stroke were both numerically more frequent in the aliskiren group than in the placebo group and adverse events and serious adverse events of interest (hyperkalaemia, hypotension and renal dysfunction) were more frequently reported in the aliskiren group than in the placebo group.

Pharmacokinetic properties

The information provided in Pharmacokinetic properties of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Pharmacokinetic properties in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Absorption

Oral enalapril maleate is rapidly absorbed, with peak serum concentrations of enalapril occurring within one hour. Based on urinary recovery, the extent of absorption of enalapril from oral enalapril maleate is approximately 60%. Following absorption, oral enalapril is rapidly and extensively hydrolysed to enalaprilat, a potent angiotensin-converting enzyme inhibitor. Peak serum concentrations of enalaprilat occur 3 to 4 hours after an oral dose of enalapril maleate. The principal components in urine are enalaprilat, accounting for about 40% of the dose, and intact enalapril. Except for conversion to enalaprilat, there is no evidence of significant metabolism of enalapril. The serum concentration profile of enalaprilat exhibits a prolonged terminal phase, apparently associated with binding to ACE. In subjects with normal renal function, steady state serum concentrations of enalaprilat were achieved by the fourth day of administration of enalapril maleate. The absorption of oral enalapril maleate is not influenced by the presence of food in the gastro-intestinal tract. The extent of absorption and hydrolysis of enalapril are similar for the various doses in the recommended therapeutic range.

Distribution

Studies in dogs indicate that enalapril crosses the blood-brain barrier poorly, if at all; enalaprilat does not enter the brain. Enalapril crosses the placental barrier. Hydrochlorothiazide crosses the placental but not the blood-brain barrier.

Biotransformation

Except for conversion to enalaprilat, there is no evidence for significant metabolism of enalapril. Hydrochlorothiazide is not metabolised but is eliminated rapidly by the kidney.

Elimination

Excretion of enalapril is primarily renal. The principal components in urine are enalaprilat, accounting for about 40% of the dose, and intact enalapril. The effective half-life for accumulation of enalaprilat following multiple doses of oral enalapril maleate is 11 hours. When plasma levels of hydrochlorothiazide have been followed for at least 24 hours, the plasma half-life has been observed to vary between 5.6 and 14.8 hours. Hydrochlorothiazide is not metabolised but is eliminated rapidly by the kidney. At least 61% of the oral dose is eliminated unchanged within 24 hours.

Renal impairment

Enalaprilat may be removed from the general circulation by haemodialysis.

Lactation

After a single 20 mg oral dose in five postpartum women, the average peak enalapril milk level was 1.7μg/L (range 0.54 to 5.9 μg/L) at 4 to 6 hours after the dose. The average peak enalaprilat level was 1.7μg/L (range 1.2 to 2.3μg/L); peaks occurred at various times over the 24-hour period. Using the peak milk level data, the estimated maximum intake of an exclusively breast-fed infant would be about 0.16% of the maternal weight-adjusted dosage. A woman who had been taking oral enalapril 10 mg daily for 11 months had peak enalapril milk levels of 2 μg/L 4 hours after a dose and peak enalaprilat levels of 0.75 μg/L about 9 hours after the dose. The total amount of enalapril and enalaprilat measured in milk during the 24 hour period was 1.44μg/L and 0.63 μg/L of milk respectively. Enalaprilat milk levels were undetectable (<0.2μg/L) 4 hours after a single dose of enalapril 5 mg in one mother and 10mg in two mothers; enalapril levels were not determined.

Preclinical safety data

The information provided in Preclinical safety data of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Preclinical safety data in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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No relevant information.

Incompatibilities

The information provided in Incompatibilities of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Incompatibilities in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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Not applicable

Special precautions for disposal and other handling

The information provided in Special precautions for disposal and other handling of Acetensil Plus is based on data of another medicine with exactly the same composition as the Acetensil Plus of the medicine (Enalapril, Hydrochlorothiazide). Be careful and be sure to specify the information on the section Special precautions for disposal and other handling in the instructions to the drug Acetensil Plus directly from the package or from the pharmacist at the pharmacy.
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No special requirements for disposal.

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